单选题：The weather was crisp and clear and you could see the mounta

题目内容：

The weather was crisp and clear and you could see the mountains fifty miles away A．fresh
B．hot
C．heavy
D．windy

参考答案：

答案解析：

Among the elements of noble gases Helium is the___.

Among the elements of noble gases Helium is the___. A．lightest B．reactive C．impo

分类：理工类题型：单选题

paragraph 5________ A．What are noble gases? B．what is the periodic table? C．What

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第二篇 Small But Wise On December 14, NASA1 blasted a small but mighty telescope i

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Noble gases are not very chemically___. A．lightest B．reactive C．important D．comp

分类：理工类题型：单选题

Her comments about men are utterly ridiculous. A．slightly B．partly C．completely

分类：理工类题型：单选题