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【简答题】
目前,世界上能够制造潜水深度6000 m潜水器的国家仅有中国、美国、日本、法国和俄罗斯,我国研制的 “ 蛟龙号 ” 潜水器曾经载人深潜7062 m,创造了世界同类作业型潜水器最大下潜深度记录,取 ρ 海水 =1.0 ×10 3 kg/m 3 ,求: ( 1 ) 在7000 m的深度,潜水器受到的海水压强为多少? ( 2 ) 若 “ 蛟龙号 ” 上有一个50 cm 2 的观察窗,在7000 m深度时观察窗受到的海水压力为多大?
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举一反三
【单选题】Which of the following is true about affirmative action according to the text?
A.
A vast majority of people support it.
B.
The minorities claim it to be a discriminatory policy.
C.
The minority students are more likely to welcome it.
D.
The Court's decision will certainly change people's attitude to it.
【单选题】关于泌尿系统结石,一下描述不正确的是:
A.
尿路结石多位于泌尿系的生理性狭窄处
B.
肾脏结石表现为肾区内形态多变的高密度影，侧位片高密度影多位于脊柱的前方
C.
输尿管结石表现为输尿管行径上高密度影，其纵轴与输尿管走行常常一致
D.
输尿管下端结石尿路造影可以有肾积水、肾脏延迟显影、不显影，也可以表现正常
E.
尿路造影时肾盂、膀胱内结石可表现为充盈缺损
【单选题】Which of the following is True about affirmative action according to the text?
A.
A vast majority of people support it.
B.
The minorities claim it to be a discriminatory policy.
C.
The minority students are more likely to welcome it.
D.
The Court's decision will certainly change people's attitude to it.
【单选题】Which of the following is TRUE about affirmative action according to the text?
A.
A vast majority of people support it.
B.
The minorities claim it to be a discriminatory policy.
C.
The minority students are more likely to welcome it.
D.
The Court's decision will certainly change people's attitude to it.
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