【简答题】One disadvantage of ______ is that they can make a company feel protected from attack even though the system is not perfect.
【简答题】公共物品的非排他性意味着可能形成( )现象,即免费享用公共物品的利益。
【单选题】海面并不是完全水平的,温度、盐分、海水密度等多种因素使得海面凹凸不平。笼统来说,水温高的部分密度小,水面就高。水流理应从高处向低处流,但是由于科里奥利力的作 用,高处的水流沿偏右的方向流动,这称为地衡流。海水的盐分等因素也可造成海水密度 不同。海水中溶入了各种各样的物质,其中纳和卤素占绝大多数。另外,也有镁、钾、钙等 盐类。盐分浓度会随年蒸发量、降水量而发生变化。此外,有河流等大陆水流注入的沿岸 ...
A.
说明温度、盐分、海水密度等多种因素是使海面凹凸不平的原因
B.
说明由于海面凹凸不平,水往低处流,从而形成洋流流向
C.
水流一般应从高处向低处流,但由于科里奥利力的作用而产生了相反的地衡流现象
D.
说明水温、盐分对海水密度的影响,海水密度对水面的影响,进一步解释洋流的流向
【判断题】公共物品的非排他性意味着可能形成 “免费搭车”现象,即免费享用公共物品的利益。
【单选题】One reason why women with no career may seek a divorce is that______.
A.
they feel that they have been robbed of their freedom
B.
they are afraid of being bossed around by their husbands
C.
they feel that their partners fail to live up to their expectations
D.
they tend to suspect their husbands' loyalty to their marriage
【单选题】According to the passage, it makes one feel ______ to be unemployed.