试题与答案

《中国民用航空通信导航监视系统运行、维护规程》适用于民用航空地面通信导航监视系统和设

题型:判断题

题目:

《中国民用航空通信导航监视系统运行、维护规程》适用于民用航空地面通信导航监视系统和设备运行管理的组织与实施,全体通信导航监视工作人员必须遵照执行。

答案:

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题型:选择题

读下图回答题。

小题1:甲地形区的主要生态问题是

A.水土流失

B.荒漠化

C.盐碱化

D.沙尘暴小题2:河流在乙处附近径流量明显减少的主要原因是

A.降水量减少

B.沿岸农业灌溉用水过多

C.植被较少

D.蒸发量增大小题3:图中乙地区农业发展中存在较明显的土壤盐碱化问题,其产生的主要原因是:

①纬度较高,冻土发育,含盐水分不易下渗

②气侯干旱,降水少,蒸发旺盛

③农业耕种过程中,长期采用大水漫灌的灌溉方式

④地处河谷地区,水流平缓,对土壤的侵蚀微弱

A.①②

B.①③

C.②③

D.③④

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题型:单项选择题

A wholesale fruit distributor, in an effort to increase its profit margins, has proposed cutting the tops off of the pineapples it ships in order to increase the number of pineapples it can ship in a standard-size truck.
Which of the following, if true, gives the pest evidence that the fruit distributor’s plan will increase its profit margins ?()

A. Pineapples with the tops cut off have been shown to rot three times faster than uncut fruit.

B. Customers buy whole pineapples in part because of their exotic, spiky appearance.

C. Cutting the tops off of pineapples may inadvertently remove some of the fruit within.

D. The fruit distributor ships primarily to a fruit canning company that has no use for pineapple tops.

E. Pineapple juice has been shown to be an even more potent source of vitamin C than orange or cranberry juice.

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