单选题Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.AGun tackleBLuff tackleCTwo-fold tackleDDouble-luff tackle
单选题
Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.
A
Gun tackle
B
Luff tackle
C
Two-fold tackle
D
Double-luff tackle
参考解析
解析：
暂无解析
相关考题：
– Linda, can you give me a lift after work? – ( ). A、It's very kind of you to do soB、Thank you for your offerC、Never mind. I'll go shoppingD、No problem. We go the same direction
The word horsepower(马力) was first used two hundred years ago.James Watt had made the first widely used steam(蒸气)engine. He had no way of telling people exactly how powerful it much work one strong horse could do in one minute. He called that unit one horsepower. With this unit he could measure the work his steam engine could do.He discovered that a horse could lift a 3,300-pound weight 10 feet into the air in one minute. His engine could lift a 3,300-pound weight 100 feet in one minute.Because his engine did ten times as much work as the horse, Watt called it a ten horsepower engine.6.The passagesays that Watt made the first widely used steam engine.A.TB.F7.Watt made up a unit of measurement based on the strength of a horse.A.TB.F8.Watt wanted to find a way to lift a 3300-pound weight.A.TB.F9.One horsepower would equal the weight a horse could lift.A.TB.F10.The title of the passageis "How the Term Horsepower Came into Being".A.TB.F
----May I have the ____ of dancing with you, Madame?----Yes, of course.A pleasure B joy C right D desire
____ a lift in your car, I would not have been home. A、Had you not given meB、I had not givenC、You had not given meD、Had I not given
You look very well after your holiday; you have _____ weight.A put up withB put awayC put onD put out
Being specialized () the export of Chinese Arts and Crafts goods,we express our desire to trade with you in this line.A、ofB、onC、atD、in
A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing? ______.A.Shift weight to the bowB.Shift weight to the center of the boatC.Shift weight to the sternD.Throw excess weight overboard
During cargo operations，your vessel develops a list due to the center of gravity rising above the transverse metacenter．To correct the list，you should ______．A.Shift weight to the high sideB.Shift weight to the centerlineC.Add weight in the lower holds or double bottomsD.Remove weight from the lower holds or double bottoms
You are in a tank wearing the self-contained breathing apparatus and you desire to return topside．How many tugs of the lifeline mean to take up the slack ________．A.OneB.TwoC.ThreeD.Four
When instructing a crew member concerning the right way to lift a weight，you would instruct him to ______．A.Arch the back to add strength to the musclesB.Bend his knees and lift with his legsC.Bend his back and stoopD.Bend his back and stoop with arms straight
共用题干What Makes Me the Weight I Am?There's no easy answer to this question.Your genetic makeup,the physical traits that get passed down to you from your parents,plays a big part in determining your size and weight. ______(46)But if your parents are smaller than average,you may want to rethink that professional basketball career!The same goes for your body type.Have you ever heard someone say a person is"big boned"?It's a way of saying the person has a large frame,or skeleton.Big bones usually weigh more than small bones. ______(47) Like your height or body type,your genes have a lot to say about what your weight will be.But that's only part of the story.Being overweight can run in someone 's family , but it may not be because of their genes._______ (48 ) And even though some kids gain weight more easily than others , when they eat right and exercise , most kids can be a healthy and happy weight that's right for them.It's true the way you live can change the way you look.How much you weigh is a balance between the calories you eat and the calories you use. ______(49)If you spend your free time watching TV, your body won' t use as many calories as it would if you played basketball,skated,or went for a walk.If you are in balance,your weight will stay right for you as you grow.But if you eat more and exercise less,you may become overweight.______(50) ______(50)A:That's why it's possible for two kids with the same height but different weight,to both be the right weight.B:If you eat more calories than your body needs to use,you will gain too much weight.C:Poor eating and exercise habits also run in families and this may be the reason the members.of a family are overweight.D:However , many overweight people have difficulty reaching their healthy body weight.E:On the other hand, "you eat less and exercise more, you, may lose weight.F:If both your parents are tall,there is a good chance you＇II be tall.
Linda, can you give me a lift after work? （）AIt‘s very kind of you to do so.BThank you for your offer.CNever mind. I‘ll go shopping.DNo problem. We go the same direction
英语中请求帮忙的问句是（）。A、Will you do me a favor?B、Would you help me lift this heavy box?C、What's the time?D、Please put your bags on the table.
单选题Neglecting friction, you desire to life a 300 kgs weight with a stress on the hauling part of 100kgs.Which of the following tackles would you use ?（）.AGun tackleBLuff tackleCToe-fold tackleDDouble-luff tackle
单选题You are approaching a vertical lift bridge.You know the span is fully open when（）.AThree white lights in a vertical line are litBA red light starts to flash at about 60 times a minuteCA yellow light is illuminated on the bridge pierDThere is a range of green lights under the lift span
单选题Neglecting friction，you desire to lift a 300 kgs weight with a stress on the hauling part of 100 kgs.Which of the following tackles would you use?（）.AGun tackleBLuff tackleCTwo-fold tackleDDouble-luff tackle
单选题You are operating a lift boat.When beginning to jack down you should（）.AJack down one leg at a timeBJack up first，then downCUndog doors to the engine roomDAssemble all personnel on the main deck
单选题Which of the following is the best title for this passage?AIKK∈: an appealing drug target for losing weight.BTeach you how to lose weight.CNew researches about losing weight.DCalories in versus calories out.
单选题M: ______to the station if you like. W: No, thanks. I don’t mind walking.AI’ll bring youBI’ll help youCI’ll give you a lift DI’ll go with you
单选题When instructing a crew member concerning the right way to lift a weight，you would instruct him to（）.AArch the back to add strength to the musclesBBend his knees and lift with his legsCBend his back and stoopDBend his back and stoop with arms straight
单选题During cargo operations, your vessel develops a list due to the center of gravity rising above the transverse metacenter. To correct the list, you should（）.Ashift weight to the high sideBshift weight to the centerlineCadd weight in the lower holds or double bottomsDremove weight from the lower holds or double bottoms
单选题A situation has occurred where it becomes necessary for you to be towed. What action should be taken to prevent your vessel from yawing?（）AShift weight to the bowBShift weight to the center of the boatCShift weight to the sternDThrow excess weight overboard
单选题The best way to determine if a load is within maximum lift limits is to use（）.Aa boom angle indicatorBa load weight indicatorCmaterial invoices for shipping weightsDprior experience with similar lifts