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【单选题】
下列不属于红外线轴温探测系统主要的生产厂家的有A.
北京
B.
广汉科峰
C.
所
D.
哈科所
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举一反三
【单选题】The horse and carriage is a thing of past, but love and marriage axe still with us and still closely interrelated. Most American marriages,【C1】______first marriage uniting young people, are the result...
A.
specially
B.
naturally
C.
particularly
D.
fortunately
【简答题】阅读短文，选择正确答案。 Are not you glad that mothers and fathers give names to their children? Names are the quickest and easiest and the most friendly way to say who's who. Another nice thing about names is th...
【简答题】什么是酶的专一性?有哪些类型?
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