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机组台数越大，单机容量越小，安装运输方便，耗费材料少，造价低。因此一般选用较小容量的机组，增加机组台数。()

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由转轮翼型引起的气蚀，通常发生在叶片出水边的背面。()

水轮机基础环位于座环下环与蜗壳之间，主要用于传递力矩。()

Section A
How to Grow Old
By Bertrand Russell
Some old people ale oppressed by the fear of death. In the young there is a justification for this feeling. (81) Young men who have reason to fear that they will be killed in battle may justifiably feel bitter in the thought that they have been cheated of the best things that life has to offer. (82) But in an old man who has known human joys and sorrows, and has achieved whatever work it was in him to do, the fear of death is somewhat abject and ignoble. (83) The best way to overcome it— so at least it seems to me—is to make your interests gradually wider and more impersonal, until bit by bit the walls of ego recede, and your life becomes increasingly merged in the universal life. An individual human existence should be like a river—small at first, narrowly contained within its banks, and rushing passionately past boulders and over waterfalls. Gradually the fiver grows wider, the banks recede, the waters flow more quietly, and in the end, without any visible break, they become merged in the sea, and painlessly lose their individual being. (84) The man who, in old age, can see his life in this way, will not suffer from the fear of death, since the things he cares for will continue. And if, with the decay of vitality, weariness increases, the thought of rest will not be unwelcome. (85) I should wish to die while still at work, knowing that others will carry on what I can no longer do and content in the thought that what was possible has been done.
(51)

地陪人员小张带国内一旅游团于早上7: 30时到达A景区旅游，到了山脚下，因昨天晚上喝酒过量头痛困倦，于是小张召集游客在山脚下对A景区做了一个概括性讲解后，就通知游客自行登山游览A景区，规定游览时间为3小时，10: 30时在景区大门集合。同时小张对全陪说：“A景区你来过多次，比较熟悉，我有点不舒服，就不登山上去了，一切就拜托您了。”然后回车睡觉了。10: 30时左右游客陆续集中。约11: 00时左右，小张带领游客去观茶艺表演，在看茶艺表演时，小张发现少了两名游客，便向全陪交代有关事宜后赶去A景区寻找游客。