(单选题)14: 力矩是力的大小与（ ）的乘积。 A: 长度； B: 力臂； C: 力偶； D: 距离。 ...

(单选题)8: 以下哪一物体可称之为自由体（ ） A: 甲板上的战斗机 B: 空中的飞机 C: 钢丝上的表演者 D: 公路上的汽车 ...

(单选题)2: 若平面一般力系向某点简化后合力矩为零，则其合力（ ） A: 一定为零； B: 一定不为零； C: 不一定为零； D: 与合力矩相等。 ...

(单选题)46: As a primary school teacher, one should be ________ with children. This is the first standard for being a good teacher. A: patient B: positive C: negative D: peaceful ...

(单选题)40: Now my mother ______ his bike to work every day instead of driving. A: ride B: road C: rides D: will ride ...

(单选题)34: Excuse me, could you show me the way to the nearest subway station?_______________________ . A: Anytime. It’s sta]range B: All right. Do you want me to go with you? C: No problem. It’s my pleasure to direct you D: Of cours...

(单选题)28: — Can I borrow your camera for a week?— ____________________________. A: Sure, here you are B: Yes, you can borrow C: Yes, bring it with you D: It doesn’t matter ...

(单选题)22: — Good morning, Dr Johnson’s office. Can I help you? — ____________________ A: Speaking, please. B: I’d like to make an appointment, please. C: Yes, go on. D: No, you can’t. ...

(单选题)16: He couldn’t buy the dictionary because he had ________ money with him. A: a few B: few C: a little D: little ...

(单选题)10: Shall I help you with that suitcase?_______________________ . A: It’s all right, thanks B: Yes, go on, please C: I don’t want to trouble you too much D: No, please don’t do it ...