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【多选题】
划分一个转轮系的判断有如下选项,其中正确的选项为 ( )A.
轮系中凡绕转动轴线转动的齿轮都属行星轮，支撑行星轮转动轴的构件就属行星架。
B.
轮系中中心轮必与行星架轴线重合，且与行星架上的行星轮相啮合。
C.
轮系中至少有一个而且仅有一个行星架
D.
轮系中最多仅能有两个太阳轮
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】人可以从事下列危害计算机信息网络安全的活动:
A.
未经允许，对计算机信息网络功能进行删除、修改或者增加的；
B.
经允许，对计算机信息网络中存储、处理或者传输的数据和应用程序进行删除、修改或者增加的；
C.
故意制作、传播计算机病毒等破坏性程序的；
D.
其它危害计算机信息网络安全的。
【简答题】What's the difference between exclusive sales and sole agency?
【单选题】The Rosenthal Center for Contemporary Art in Cincinnati is Zaha Hadid's sole completed U.S. pro jeet.
A.
Y
B.
N
C.
NG
【简答题】__________he tried, he was not successful.
【单选题】Dialectic is NOT ______.
A.
a method of approaching knowledge
B.
Socrates's sole contribution to philosophy
C.
to exam statements by pursuing their implications
D.
based on the assumption that if a statement were true it could not lead to false consequences
【单选题】This is a new shirt. He ________ yesterday. [ ]
A.
tried it on
B.
tried on it
C.
tried it up
D.
tried up it
【单选题】He was sure to be successful, for he had always succeeded ________ whatever he tried.
A.
of
B.
at
C.
in
D.
for
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