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【单选题】
Then Jay thinks Rashid is ________ his shouldersA.
moving
B.
shrugging
C.
relaxing
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【简答题】设f 1 、f 2 都是从代数系统(A，★)到(B，*)的同态．设g是从A到B的一个映射，使得对任意a∈A都有g(a)=f 1 (a)*f 2 (a)．证明：如果(B，*)是一个可交换半群，那么g是由(A，★)到(B，*)的同态．
【单选题】Republican efforts to impeach or __________ the IRS commissioner are exercises in partisanship and a waste of time and money, the Democrat asserted.
A.
censure
B.
censer
C.
censor
【单选题】Mitch MeConnell was ______.
A.
Secretary of State
B.
Republican senator
C.
Democratic senator
D.
the spokesman of the Bush administration
【简答题】设f:G1-G是一个群同态映射,那么下列命题错误的是
【单选题】听力原文： A grass-roots group troubled by recent Republican triumphs and the influence of the Christian right is fighting back in Northern Virginia by defending the teaching of Darwinian evolution, a batt...
A.
The theory of evolution.
B.
The new classroom approaches.
C.
The Christian right.
D.
The government.
【简答题】Efforts to accelerate the current energy transitions didn‘t succeed as expected． 查看材料
【单选题】Despite efforts to eradicate it, corruption persists, though it doesn't ______
A.
speed
B.
hasten
C.
accelerate
D.
boost
【简答题】设f和g都是群(G 1 ，★)到群(G 2 ，*)的同态映射，证明：(C，★)是(G 1 ，★)的一个子群，其中，C={x|x∈G 1 ，且f(x)=g(x)}．
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