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【判断题】
工程材料的成分不同，它们的性能不同。但是成分相同的材料，通过不同的工艺处理，它们的性能也不同。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】"Could you come back to clean the room later?"
A.
"Of course!"
B.
"Sure. When?"
C.
"Certainly. What time would be best?"
D.
"Sounds like you mean...
【单选题】A guest says: "Could you come back later to clean the room?" What does a professional room attendant say?
A.
"Certainly. What time would be best?"
B.
"I'm sorry, I'm busy later"
C.
"So what you're saying is…"
D.
"Sure"
【简答题】绘制圆的中心线时，（）应是长线段的交点。
【单选题】-Could you come back home 9:30? -I'm afraid not. I'll have a meeting at 9:00. [ ]
A.
by
B.
until
C.
with
D.
after
【简答题】绘制圆的中心线时,圆心应是 ( )交点。
【单选题】—I’m busy right now. Could you come back time? —OK. See you later.
A.
another
B.
the other
C.
others
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