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【简答题】一结构如图(a)所示。圆轴AB的扭转刚度为GI p ，立杆CD和FG的抗拉刚度为EA，尺寸a及外力偶矩M e 均为已知，M e 作用在横梁上。圆轴与横梁牢固结合，垂直相交，立杆与横梁铰接，也垂直相交。横梁可视为刚体。求立杆的轴力及圆轴的扭矩。
【多选题】自备发电机组安装质量及功能检测时，检测内容及方法正确的是（）。
A.
自动启动并达到额定转速并发电的时间不应大于30s
B.
储油箱内的油量应能满足发电机运行3－8小时的用量
C.
手动方式启动时，发电机应60s内启动运转正常
D.
仪表、指示灯及开关按钮等应完好
【简答题】如何理解“春夏养阳,秋冬养阴”句的含义?
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...
A.
The woman is a close friend of the man.
B.
The woman has been working too hard.
C.
The woman is seeing a doctor.
D.
The woman is tired of her work.
【单选题】A hierarchical network topology in which each device is connected to a central node, either directly or through one or more other devices, is also called a(n) _______ network.
A.
tree
B.
bus
C.
mesh
D.
star
【单选题】A binary tree of depth “d” is an almost complete binary tree if .
A.
(i) Each leaf in the tree is either at level “ d ” or at level “ d – 1 ”
B.
(ii) For any node “ n ” in the tree with a right descendent at level “ d ” all the left descendents of “ n ” that are leaves, are also at level “ d ”
C.
Both (i) & (ii)
D.
None of them
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