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单项选择题

据统计，无人机系统事故6%以上发生在

A．起降阶段
B．巡航阶段
C．滑跑阶段
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相关考题

未知题型
确定下列函数中C1，C2的值，使得函数满足所给定的条件：
(1)y＝C1cosx＋C2sinx，y｜x＝0＝1，yˊ｜x＝0＝3；
(2)y＝(C1+C2x)e2x，y｜x＝0＝0，yˊ｜x＝0＝1．
未知题型
Women are a force for change in Australian society. The pride of place given to men as almost the sole shapers of Australian history is being challengeD.
Today husbands more often than no share household chores, and more 79. ______
men are finding women alongside them in the workplacE.It may be some
time before there is a woman prime minister of Australia, but the need
of women at the top--and their to be there--is now widely recognizeD.80. ______
The growing role of men in the Australian work force is a cause and 81. ______
consequence of change attitudes and lifestyles in Australian society. 82. ______
In offices, laboratories and factories, in social and political
organizations, women are making their presence feel. There are almost no 83. ______
remaining legal barriers against women in Australia in jobs, commercial
contracts, politics and social lifE.The barriers that mainly stem from modem 84. ______
attitudes built into society. They are not easily changed by new laws.
Women have brought out the most significant change in the Australian 85. ______
work force simply by entering it in thousands, and by seeking jobs which
before were assumed to be suitable with men only. There are now women in 86. ______
Australia drive buses, taxis, racing cars and 50-ton trucks. They are 87. ______
racehorse jockeys (职业赛马骑手). They are apprentice electricians and
mechanics. They are air-traffic controllers. They shear sheep and worked as 88. ______
laborers. They are judges members of parliament.
(89)
单项选择题
A company had average total assets of 190,700, and reports various segment information. Segment A had average total assets of 98,230. Segment B had average assets of 16,190. Calculate the segment return on assets for Segment A.
A、 19.4%.
B、22.4%.
C、26.1%.
D、10.7%.
E、20.2%.
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