试题与答案

施工单位的下列作法中,违反国家有关环境保护法律规定的有() A.在施工现场附近的河流

题型:多项选择题

题目:

施工单位的下列作法中,违反国家有关环境保护法律规定的有()

A.在施工现场附近的河流中清洗油桶

B.将施工垃圾处理后倒入附近河流

C.转运施工废弃物时未对其进行掩盖

D.居民区附近的高架桥施工时未设置声屏障

E.工程抢修工作一直持续到22点

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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题型:单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet. Spread spectrum simply means that data is sent in small pieces over a number of the(71) frequencies available for use at any time in the specified range. Devices using(72) spread spectrum (DSSS) communicate by (73) each byte of data into several parts and sending them concurrently on different (74) . DSSS uses a lot of the available (75), about 22 megahertz (MHz).

74()

A.bits

B.frequencies

C.packets

D.messages

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