有一弹簧测力计，挂钩上不施加力时，指针指在零刻度线上方，此时用手拉弹簧测力计的挂钩，使弹簧测力计的示数为3N，则手拉弹簧测力计的力的大小是

题干

有一弹簧测力计，挂钩上不施加力时，指针指在零刻度线上方，此时用手拉弹簧测力计的挂钩，使弹簧测力计的示数为3N，则手拉弹簧测力计的力的大小是（）

A：3N

B：大于3N

C：小于3N

D：不能确定

上一题下一题 0.0难度选择题更新时间:2020-09-27 20:40:59

B

A: Hi, Jim.____

B: It's a little boring. We have so many things to learn.

A: Really? Well, I love geography very much.____How about you?

B: I love this subject too.____

A: We have two computer classes every week They're very interesting.

B: Interesting? ____

A: Don't you have anything you enjoy at school?

B: ____ I love taking part in the tug-of-war contest (拔河比赛) in PE class.

A: Oh, that's exciting!

A. Yes I do.

B. What's your favourite subject?

C. When do you go to school every day?

D. What do you think of your school life?

E. But I have never done well in the exam.

F. But we can't play computer games in class.

G. I can learn a lot about different countries in the world in geography class.