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【简答题】
图示两端铰支细长压杆的截面为矩形,横截面尺寸如图所示,其中 h>b ,杆轴线为 x 轴,当其失稳时挠曲轴位于 平面内。(填xoy、xoz或yoz)
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【简答题】What is hero’s journey according to the video? Hero’s journey is compared to a __1__ , which begins and ends in the hero’s ordinary world, but the quest passes through an unfamiliar, special world. Al...
【单选题】Travel Accounts A There are many reasons why individuals have traveled beyond their own societies. Some travelers may have simply desired to satisfy curiosity about the larger world. Until recent tim...
A.
The production of travel books
B.
The literary status of travel books
C.
The historical significance of travel books
D.
The development of travel books
【简答题】2 (QR) What is a meet-in-the-middle attack?
【单选题】This play, ______, is very wonderful: there are many interesting characters in it.
A.
out of the question
B.
on the whole
C.
in doubt
D.
under no condition
【简答题】25 years ago, a group of scientists embarked on an audacious quest: the creation of whole new organs. Brothers Joseph and Charles Vacanti at Harvard Medical School and Robert Langer of the Massachuset...
【单选题】特种设备是指由国家认定的,因设备本身和外在因素的影响容易发生事故,并且一旦发生事故会造成人身伤亡及重大经济损失的危险性较大的设备。特种设备应由国家授权指定的安全监察机构,依据国家法律、法规对特种设备的设计、制造(包括安装)和使用进行强制性执法管理。属于特种设备有电梯、锅炉、压力容器、( )等。
A.
刨床
B.
挖掘机
C.
起重机械
D.
齿轮加工机
【单选题】恒温恒压下，某可逆电池放电时的反应热Qr,m。同样温度压力下，反应在巨大刚性容器中进行时，系统与环境交换的热Qm，那么|Qr,m|与|Qm|的大小关系（）
A.
| Qr,m | = | Qm |
B.
| Qr,m | < | Qm |
C.
| Qr,m | > | Qm |
D.
不能确定
【单选题】休克早期造成微循环缺血的主要机制是
A.
交感神经-肾上腺髓质系统兴奋
B.
肾素-血管紧张素-醛固酮系统兴奋
C.
血管加压素释放
D.
血栓素A2释放
E.
内皮素释放
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