问题
多项选择题
机电工程材料是构成最终工程产品的一部分，是关系到工程质量与工程效益的关键。机电工程材料品种、规格、型号繁多，常用材料有金属材料、非金属材料和电工线材。在施工时，必须按照设计文件要求进行。
机电工程中常用的绝热材料的种类很多，通常有（）等。
A．离心玻璃棉类
B．塑料制品
C．微孔硅酸壳
D．高分子材料
E．岩棉类
答案
参考答案：A, C, E
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机电工程材料是构成最终工程产品的一部分，是关系到工程质量与工程效益的关键。机电工程材料品种、规格、型号繁多，常用材料有金属材料、非金属材料和电工线材。在施工时，必须按照设计文件要求进行。
机电工程中常用的绝热材料的种类很多，通常有（）等。
A．离心玻璃棉类
B．塑料制品
C．微孔硅酸壳
D．高分子材料
E．岩棉类
参考答案：A, C, E
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| An old lady went out 1 last Sunday. She came to a bank and saw a car near the door. a man got 2 it and went into the bank. She looked into the car, the keys were in the lock. The old lady took the keys and 3 the man to the bank. The man took a gun 4 his pockets, and said to the officers, "Give me 5 money!" But the old lady didn't see this, she went to the man and 6 the keys in his hands and said, "Young man, you are foolish. Never 7 your keys in your car. Someone's going to steal it." The man looked at the old woman for a few seconds. The he took 8 and 9 the bank, got into his car and drove away 10 money. | ||||
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