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【单选题】
引起绝对性红细胞增多的原因是A.
脱水血液浓缩
B.
严重的心肺疾患
C.
严重的组织损伤
D.
急性大出血
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举一反三
【单选题】（中职）下面哪一个选项是空缺处的最佳答案？ Sam is ________ about his speech because he thinks he is well prepared.
A.
confident
B.
modest
C.
curious
【单选题】I was told that although these old buildings _______ the Qing Dynasty, they remained in good condition.
A.
are dated back to
B.
dated back to
C.
dating back to
D.
have dated back to
【单选题】（中职）下面哪一个选项是空缺处的最佳答案？ Life is ________ the unexpected. Whatever we do, try our best.
A.
full of
B.
proud of
C.
instead of
【简答题】Old buildings 容易损坏 in severe weather if no proper measures are taken to protect them. (prone)
【简答题】(华南理工大学2010年考研试题)如图7一83所示电路中，已知US=10V，R1=R2=2Ω，L=2H，C=2F，r=5Ω。在电路达到稳态时，将开关S合上，求开关合上后流经开关的电流iK(t)。
【单选题】（中职）下面哪一个选项是空缺处的最佳答案？ David felt ________ because he was not able to get a ticket to the concert.
A.
excited
B.
disappointed
C.
moved
【单选题】（中职）下面哪一个选项是空缺处的最佳答案？ My sister is still very ________ with me because I broke her new pencil box yesterday.
A.
satisfied
B.
angry
C.
popular
【单选题】（中职）下面哪一个选项是空缺处的最佳答案？ You bought the last ticket for the concert. How________ you are!
A.
sweet
B.
lucky
C.
strange
【简答题】在如图所示电路中,已知N0为一无源网络,当Us =2V、Is =3A时,U0 =10V;当Us=3V,Is=2A时,U0=10V,求Us =10V、Is =10A时的U0 。
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