如图所示,不计绳重和摩擦,物重G=550牛,滑轮重为10牛,当物体G匀速上升时,

题型:填空题

问题:

如图所示,不计绳重和摩擦,物重G=550牛,滑轮重为10牛,当物体G匀速上升时,则挂钩B承受拉力为_______牛,挂钩A承受_______牛的拉力,拉力F为_______牛,若绳子自由端向上拉过2米,则物体向上移动________米。

考点:杠杆及其五要素
题型:填空题

在什么情况下应采用现浇楼面

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单句改错。

1. I broke my glasses, without which I could see anything. _________________

2. Tom as well as two of his classmates were invited to the party. _________________

3. Watch out for that man who is wanted on the Internet. He is real danger. _________________

4. How much will this new project bring up to our city this year? _________________

5. You shouldn't hike unless you will know how to swim. _________________

6. She is good at management and she must be equal to manage our company. __________________

7. I felt very lonely when I traveled in Chengdu alone. I must have taken my family. __________________

8. When she saw the frightened tiger, her face turned pale (苍白的). __________________

9. The book is high thought of. __________________

10. She has ten-years experience in working abroad. __________________

题型:填空题

我国目前使用的人民币非现金支付工具主要包括( )。

A.汇票

B.支票

C.本票

D.汇兑

题型:填空题

基金交易费中,由证券公司向基金收取的是( )。

A.佣金
B.过户费
C.经手费
D.证管费

题型:填空题

重液和重悬浮液相比,下列()不是重液的特点。

A、价格高

B、不易回收

C、多数有毒、腐蚀性

D、易挥发

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