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问题 单项选择题

将局部放电超声波检测仪调至适当量程，传感器悬浮于空气中，测量空间背景噪声并记录，根据（）设定信号检测阈值。

A.经验

B.规程规定

C.现场噪声水平

D.仪器灵敏度

答案

参考答案：C

单项选择题

在调配塑料的过程中，当调和物表面有痂形成，弹性大，而且其可塑性已消失，由此我们可以判定调和物此时处于()

A．糊状期

B．粘丝期

C．硬化期

D．面团期

E．橡皮期
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填空题

根据短文内容及首字母提示补全单词。

     Another weekend is coming. My classmates are talking about how to s  1      the weekend. Some of

them are going to have a sound s  2      and get up late. Some are going to watch TV, o  3     are going to

have an outing.

     I have my o  4     plan, however. On Saturday, I'm going to f   5     my homework, because there will b  6      an English test next week. I want to do w  7     in it, so I must get ready for it. On Sunday, I will w  8     my grandmother with my parents. She is ill. We want to

know if she is b  9      now.

     Besides (除……之外) all these , I'll make f  10     use of my weekend reading books.
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