问题
单项选择题
( )不是厚板窄间隙焊的优点。
A．生产率高
B．焊接材料和能源消耗低
C．热输入小
D．不易产生夹渣
答案
参考答案：D
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( )不是厚板窄间隙焊的优点。
A．生产率高
B．焊接材料和能源消耗低
C．热输入小
D．不易产生夹渣
参考答案：D
| 根据下面的对话内容，从对话前的选项中选出最佳选项填入对话的横线上。选项中有一项为多余选项。 | |
| |
| Clerk: 1______ Sally: Yes, please. I want a T-shirt. Clerk: Come here and see. We have many different kinds of T-shirts. 2______ Sally: Yellow or blue. Clerk: OK. This is a yellow one. Here you are. Sally: 3______ Clerk: Seventy-eight Yuan. Sally: Do you have any cheaper ones? 4______ Clerk: It's very cheap, only thirty-six Yuan. Sally: 5______. Here's the money. Thank you. Clerk: You're welcome. |