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【单选题】
进入施工现场的所有人佩戴()。A.
安全帽
B.
安全带
C.
绝缘鞋
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反馈参考答案：
举一反三
【单选题】听力原文：W: Do you think we should urge Tom to study math? M: Oh, we should leave that decision up to him. Q: What does the man mean? (17)
A.
It's time to urge him to study math.
B.
He himself should make the decision.
C.
They should help him study math.
D.
They should leave right now.
【简答题】_ ____ 是显示器最重要的技术指标。
【单选题】听力原文：M: Do you think we should have Tom study French? W: We should let him make the decision. Q: What does the woman mean'? (3)
A.
Tom likes to study a foreign language.
B.
Tom should make his own decision.
C.
Tom may pay a visit to France.
D.
Tom has not made up his mind.
【简答题】金属材料的使用是人类文明和社会进步的标志之一，下列材料中不属于合金的是（ ） A．生铁 B．硬铝 C．水银 D．青铜
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