题目内容

主矢与简化中心位置( )。

A. 无关
B. 有关
C. 有时有关,有时无关
D. 无法确定

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主矢和主矩都不为零时,( )。

A. 可以通过移动简化中心位置而简化为一个主矢
B. 构件一边移动一边转动
C. 可以用一个力等效
D. 可以用一个力偶等效
E. 构件处于平衡状态

Customer: I’m (1) ____a sweater. Do you have any blue sweaters?Mateo: Well, is the sweater for you or for someone else?Customer: It’s for me.Hector: Well, (2) this sweater right here? I think this would look great on you.Customer: I like it. It might be a bit big. What size is it?Mateo: That is a (3) . Here is a (4) .Customer: Yes, I think this is the right (5) . How much is it?Mateo: It’s (6) dollars.

Customer:Hello, (1)please?Salesclerk: Sure. What are you (2) ?Customer: I’m looking for a new pair of (3) .Salesclerk: No problem. What (4) ?Customer: I usually (5) .Salesclerk: 32 inches? Here.(6) . They are (7) today.Customer: Nice. How much are they?Salesclerk: Only $ (8) .Customer: Thanks! I’ll (9) and let you know.Salesclerk: Great! The (10) rooms are just over there.

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