题目内容
烟煤和雪都能较安全地吸取辐射能，它们是黑体。( )
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Section ADirections: This’ section is to test your ability to understand short dialogues. There are $ recorded dialogues in it. After each dialogue, there is a recorded question. Both the dialogues and questions will be spoken only once. When you hear a question, you should decide on the correct answer from the 4 choices marked A) , B), C) and D) given in your test paper.. Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.
玻璃转子流量计测量温度高于100℃的介质时，应装保护罩。( )
液体与气体相比，液体具有显著的压缩性和膨胀性。( )
When did her mother go back to work（）
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