单选题设a、b为字符型变量，与a-b等价的表达式是（）.Atrim（a）+b+space（len（a）-len（trim（a）））Btrim（a）=bCa+bDa*b
单选题
设a、b为字符型变量，与a-b等价的表达式是（）.
A
trim（a）+b+space（len（a）-len（trim（a）））
B
trim（a）=b
C
a+b
D
a*b
参考解析
解析：
暂无解析
相关考题：
执行下列命令后，变量R1的值为【 】，R2的值为【 】。 STORE SPACE(5)+"数据库管理系统"+SPACE(3)TO R R1=LEN(R) R2=LEN(TRIM(LTRIM(R)))
在窗体上画一个命令按钮，然后编写如下事件过程：Private Sub Command1_Click()Dim Y as StringX=5Y=X Space(3) XPrint X；Print Trim(Y)；Len(Trim(Y))End Sub该程序的执行结果是【 】。
下列函数中，能够得到一个字符串的一组函数是 ( )A．Leh函数、Right函数、Mid函数B．LTrim函数、RTrim函数、Trim函数C．Len函数、LCase函数、UCase函数D．Space函数、Len函数、Trim函数
For a vessel with longitudinal inclination, an increase in GML causes ______.A.list to stabilize at an angle of lollB.trim to stabilize at an angle of lollC.trim to increaseD.trim to decrease
单选题The difference between the initial trim and the trim after loading is known as（）.AtrimBchange of trimCfinal trimDchange of draft
单选题If the cause of severe list or trim is off-center ballast，counterflooding into empty tanks will（）.Aincrease the righting momentBincrease the righting armCincrease list or trimDdecrease list or trim
单选题What is MTI?（）.AThe fioot/tons needed to trim the vessel by 1 inchBThe foot/tons needed to trim the vessel by 1 footCThe moments needed to trim the vessel by 1 centimeterDThe amount of vessel will trim when loading 100 tons 100 feet from the tipping center