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【单选题】
他励直流电动机,当励磁电流和负载转矩不变时,电枢电压下降,待电机稳定运行时,则转速n,电枢电流Ia和反电动势E的变化应是( )A.
n下降 ,Ia不变, E 降低
B.
n上升 ,Ia变小, E 增大
C.
n不变 ,Ia变小, E 不变
D.
n上升 ,Ia变大, E 增大
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【单选题】Passage 2 With only about 1,000 pandas left in the world,China is desperately trying to clone the animal and save the endangered species. That's a move similar to what a Texas A&M University researche...
A.
Lack of available panda eggs.
B.
Lack of host animals.
C.
Lack of qualified researchers.
D.
Lack of funds.
【简答题】Dear Prof. Smith, Many thanks for your hospitability and the kindness you showed me during my recent visit to your country. It was thoughtful of you to introduce me to so many of your famous professor...
【单选题】Passage 2 With only about 1,000 pandas left in the world,China is desperately trying to clone the animal and save the endangered species. That's a move similar to what a Texas A&M University researche...
A.
essentially new
B.
pioneering
C.
evolutionary
D.
epoch-making
【单选题】一般纳税企业在销售过程中发生销售退回,那么在增值税科目中应作( )处理
A.
贷记 “应交税费-应交增值税（销项税额）”
B.
借记 “应交税费-应交增值税（销项税额）”
C.
借记 “应交税费-应交增值税（进项税额）”
D.
贷记 “应交税费-应交增值税（进项税额转出）”
【简答题】A. Read and listen to a dialogue or a passage twice and choose the best answer.Guest(G): Boy, come hereWaiter(W): Is everything to your satisfaction?G: No. The steak was recommended, but it is not v...
【单选题】Choose the best topic sentence. ( )The teachers are all very old and boring. The courses are not good. The buildings are old and dirty and there is no heating in them. Worst of all, it takes me two ho...
A.
My college is too old.
B.
I don’t like the teachers at my college.
C.
I really hate my college.
D.
I had gone to a different college.
【单选题】Passage 2 With only about 1,000 pandas left in the world,China is desperately trying to clone the animal and save the endangered species. That's a move similar to what a Texas A&M University researche...
A.
1 Year.
B.
3 to 5 years.
C.
2 years.
D.
25 years.
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