A vessel trawling would display______．A.a black ballB.a basketC.a double cone，point to pointD.none of the above
A vessel trawling would display______．
A.a black ball
B.a basket
C.a double cone，point to point
D.none of the above
相关考题：
下面程序的输出结果是【】。include include class point{double x; double y; 下面程序的输出结果是【 】。include ＜iostream.h＞include ＜math.h＞class point{double x;double y;public:point(double a, double b){x=a;y=b;}friend double distance(point a, point b) ;};double distance(point a, point b){return sqrt ((a. x-b.x) * (a. x-b.x)+ (a. y-b. y) * (a. y-b. y) );}void main(){point p1(1,2);point p2(5,2);cout＜＜distance(p1,p2)＜＜end1;}
阅读下列C++程序和程序说明，将应填入(n)处的字句写在对应栏内。【说明】Point是平面坐标系上的点类，Line是从Point派生出来的直线类。include ＜iostream.h＞class Point{public:Point (int x, int y) ;Point (Point p) ;～Point();void set (double x, double y) ;void print();private:double X,Y;};Point::Point (int x, int y) //Point 构造函数{X=x; Y=y; }Point::Point ( (1) ) //Point 拷贝构造函数{X=p.X; Y=p.Y；}void Point::set (double x, double y){X=x; Y=y; }void Point::print(){cout＜＜' ('＜＜X＜＜","＜＜Y＜＜") "＜＜endl; }Point::～Point(){cout＜＜"Point 的析构函数被调用! "＜＜endl;class Line: public Point{public:Line (int x, int y, int k) ;Line (Line s) ;～Line();void set (double x, double y, double k)void print();private:double K;};(2)//Line 构造函数实现{ K=k;}(3)//Line 拷贝构造函数实现{K=s.K;}void Line::set (double x, double y, double k){ (4);K=k;}void Line::print(){cout＜＜" 直线经过点";(5);cout＜＜"斜率为: k="＜＜K＜＜endl;}Line: :～Line(){cout＜＜"Line 析构函数被调用! "＜＜endl;}void main(){Line 11 (1,1,2) ;11 .print();Linel2 (11) ;12.set (3,2,1) ;12.print();}
下面程序的输出结果是【】。 inclde include using namespace std; class point { 下面程序的输出结果是【 】。inclde＜iostreamn＞include＜math＞using namespace std；class point{private：double x；double y；public：point(double a，double b){x=a；y=b；}friend double distance(point a,point b)；}；double distance(point a，point b){return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y))；}int main(){point p1(1，2)；point p2(5，2)；cout＜＜distalice(p1，p2)＜＜endl；return 0；}
下面程序的输出结果是()。includeincludeusing namespace std;class point{p 下面程序的输出结果是( )。 #include＜iostream＞ #include＜math.h＞ using namespace std; class point { private: double x; double y; public: point(double a,double b) { x=a; y=b; } friend double distances(point a,point b); }; double distances(point a,point b) { return sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y)); } int main() { point p1(1,2); point p2(5,2); cout＜＜distances(p1,p2)＜＜end1; return 0; }A．2B．4C．8D．16
下列程序的执行结果为【 】。include class Point{public:Point(double i, double j) 下列程序的执行结果为【 】。include ＜iostream. h＞class Point{public:Point(double i, double j) { x=i; y=j;}double Area() const { return 0.0;}private:double x, y;};class Rectangle: public Point{public:Rectangle(double i, double j, double k, double 1)double Area() const {return w * h;}private:double w, h;};Rectangle: :Rectangle(double i, double j, double k. double 1): Point(i,j).{w=k, h=1}void fun(Point s){cout＜＜s. Area()＜＜end1;}void main( ){Rectangle rec(3.0, 5.2, 15.0. 25.0);fun(rec)}
有以下程序:includeincludeusing namespace std; class point{private:double 有以下程序： #include＜iostream＞ #include＜math＞ using namespace std； class point { private： double x； double y； public： point(double a,double B) { x=a； y=b； } friend double distance (point a,point B) ；A．1B．5C．4D．6
有以下程序:include include using namespace std;class point{private:doubl 有以下程序：#include ＜iostream＞#include ＜math＞using namespace std;class point{private: double x; double y;public: point(double a, double b { x=a; y=b; friend double distance (point a, point b ; };double distance(point a, point b return sqrt((a. x-b. x )*(a. x -b. x )+ (a. x -b. x)*(a. x-b. x));}int main (){ point p1 (1,2); point p2(5,2); cout＜＜distance (p1, p2)＜＜end1; return 0;} 程序运行后的输出结果是A．1B．5C．4D．6
A fishing vessel displaying the lights shown is ______.A.anchoredB.underway but not fishingC.tending a small fishing boatD.fishing by trawling
A vessel would be referred to as "stiff" when the weight of the cargo is ______.A.evenly distributed vertically and the double bottoms are fullB.concentrated low and the double bottoms are emptyC.concentrated low and the double bottoms are fullD.concentrated high and the double bottoms are empty
A vessel engaged in minesweeping on the high seas carries which of the following day signals ?A.Two green balls in a vertical lineB.Two black balls in a vertical lineC.A black ball at the foretruck and yardarm endsD.A shape of two cones point to point
A vessel under sail, displaying a black conical shape, point down, is regarded as ______.A.Power drivenB.SailingC.Not under commandD.Fishing
In the daytime, you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows ______.A.a black ballB.a black coneC.two black conesD.a basket
共用题干Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A black hole in the universe is not a solid object,like a planet,but it is shaped like a sphere（球体）. Astronomers（天文学家）think that at the center of a black hole there is a single point in space with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）. If the singularity theory is correct,it means that when a massive star collapses,all the material in it disappears into the singularity.The center of a black hole would not really be a hole at all,but an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist,they are difficult to observe.These are the reasons.No light or anything else comes out of black holes.As a result,they are invisible to a telescope.In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.The nearest black holes would be dozens of light years away from Earth.One light year is about 6 trillion（万亿）miles. Even the most powerlul telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist.There are still answers to be found,however,so black holes remain one of the mysteries of the universe.The nearest black holes are hundreds of light years away from us.A:Right B:Wrong C:Not mentioned
共用题干Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A black hole in the universe is not a solid object,like a planet,but it is shaped like a sphere（球体）. Astronomers（天文学家）think that at the center of a black hole there is a single point in space with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）. If the singularity theory is correct,it means that when a massive star collapses,all the material in it disappears into the singularity.The center of a black hole would not really be a hole at all,but an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist,they are difficult to observe.These are the reasons.No light or anything else comes out of black holes.As a result,they are invisible to a telescope.In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.The nearest black holes would be dozens of light years away from Earth.One light year is about 6 trillion（万亿）miles. Even the most powerlul telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist.There are still answers to be found,however,so black holes remain one of the mysteries of the universe.The sun is the heaviest star in the universe.A:Right B:Wrong C:Not mentioned
单选题At sea，on what occasion would you display two red lights at night or two black balls during the day?（）.AWhen vessel is on fireBWhen vessel is not under commandCWhen vessel is carrying the dangerous cargoesDWhen vessel is restricted in her ability to maneuver
单选题Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）ABy day，she shall carry a black cylinder shapeBBy day，she shall carry two black balls in a vertical lineCBy night，she would show the same lights as a vessel not under commandDBy day，she would show the same shapes as a vessel restricted in her ability to maneuver
单选题A fishing vessel displaying the lights shown is（）.AanchoredBunderway but not fishingCtending a small fishing boatDfishing by trawling
单选题A power driven vessel when towing and the length of the tow exceeds 200 meters shall exhibit during daylight hours where they can best be seen which of the following shapes? （）Aa diamond shapeBtwo cones，apexes togetherCa black ballDone cone，apex upward
单选题A vessel trawling will display a（）.Ared light over a white lightBgreen light over a white lightCyellow light over a red lightDwhite light over a green light
单选题A vessel engaged in fishing during the day would show（）.Aone black ballBtwo cones with bases togetherCa cone，apex downwardDtwo cones，apexes together
单选题A vessel would be referred to as tender when the weight of the cargo is（）.Aevenly distributed vertically and the double bottoms are fullBconcentrated low and the double bottoms are emptyCconcentrated low and the double bottoms are fullDconcentrated high and the double bottoms are empty
单选题A sailing vessel is overtaking a steam vessel in a fairway on International waters，so as to pass on the steam vessel’s port side． The sailing vessel is the（）.Aprivileged vessel and would sound two short blastsBburdened vessel and would sound two prolonged blasts followed by two short blastsCburdened vessel and would sound no whistle signalDprivileged vessel and would sound no whistle signal
单选题During the day，a vessel with a tow over 200 meters in length will show（）.Aa black ballBa diamond shapeCtwo cones，apexes togetherDone cone，apex upward
单选题Which vessel would display a cone，apex downward（）.AA fishing vessel with outlying gearBA vessel proceeding under sail and machineryCA vessel engaged in diving operationsDA vessel being towed
单选题A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.AA black ball in the forepart of her vesselBA black double frustum of a coneCA basket where best seenDA black cone point upwards