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问题 补全对话，情景问答
根据图片完成对话.
A: __________?
B: I did my homework last night.
A: What did Cindy do this morning?
B: __________.
A: __________?
B: Yes,they did.
A: __________?
B: Their weekend was great!
A: Did the old woman read a book?
B: __________.
答案

1. What did you do last night

2. She practiced / played the guitar

3. Did they play soccer last weekend

4. How was their weekend

5. No, she didn't

选择题
如图所示，AB是一质量为m的均匀细直杆，A端靠在光滑的竖直墙壁上，B端置于水平地面上，杆身与竖直方向夹角为θ，杆与地面的摩擦系数为μ，保持平衡，则此时杆与地面的摩擦力为（　　）

A．mgtgθ

B．mgsinθ

C．μmg

D．μmg
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单项选择题

延期付款对外支付时，由（）登陆贸易信贷登记管理系统对该笔延期付款办理相应的注销手续。

A、付汇银行

B、外汇局

C、企业

D、以上任一个都可以
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