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【简答题】
将直流电能转换为交流电能又馈送回交流电网的逆变电路称为 逆变器。
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【单选题】来自下肢静脉的血栓,最可能栓塞的部位是( )
A.
支气管静脉
B.
支气管动脉
C.
肺静脉
D.
肺动脉
E.
下腔静脉
【单选题】下列不属于肘关节组成的是
A.
肱桡关节
B.
肱尺关节
C.
桡尺近侧关节
D.
桡尺远侧关节
【单选题】设〈 G,* 〉是群,且 |G|>1 ,则下列命题成立的是 ( )
A.
G 中有幺元
B.
G 中有零元
C.
G 有生成元
D.
G 中除了幺元外还有其他幂等元
【单选题】The people in the office suddenly started working because ______.
A.
they saw a stranger in the office
B.
they had finished their morning break
C.
no one wanted to talk to Marie
D.
the boss was about to arrive
【简答题】险种的生命周期是指险种的开发期( 1 )、( 2 )、( 3 )、衰退期。
【单选题】设G是群,e是幺元,a,b,cÎG,则下面关于群的性质描述错误的是( )
A.
若 ab = b ,则必有 a = e
B.
若 b ≠ c ,有可能 ab = ac
C.
G 有唯一的幂等元
D.
a G=G a
【单选题】下列哪项不属于损伤性骨化的特点?
A.
常见于关节扭伤、脱位及关节附近的骨折
B.
最常发生在肘关节
C.
发生的原因是形成骨膜下血肿
D.
关节附近的软组织广泛骨化
E.
不影响关节活动功能
【单选题】设G是群,e是单位元,a,b,c∈G,则下面关于群的性质描述错误的是
A.
若ab=b,则必有a=e
B.
若b≠c,有可能ab=ac
C.
G有唯一的幂等元
D.
aG=Ga
【简答题】The people in the office suddenly started working because______. [A] they saw a stranger in the office [B] their morning break was ended [C] no one wanted to talk to Made [D] the boss was about to arr...
【单选题】Neither my father nor my mother ______ rock music. They think that it's too ______. [     ]
A.
like; noise
B.
likes; noise
C.
like; noisy
D.
likes; noisy
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