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【简答题】
设E是 的可测子集， X={x∈L 2 (E)：tx(t)∈L 2 (E)} 定义F：X→L 2 (E)为 F(x)(t)=tx(t)，t∈E， x∈X 证明若E=[a，b]，则F是连续的；若 ，则F是不连续的。
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举一反三
【单选题】ISO15489是（）.
A.
《医学实验室质量和能力的专用要求》
B.
《检测和校准实验室能力的通用要求》
C.
《实验室生物安全通用要求》
D.
《临床实验室改进法案》
E.
《临床实验室改进法修正案》
【简答题】排卵后孕激素由黄体分泌,故亦称为黄体酮,它能抑制子宫平滑肌的活动,所以具有_________作用;妊娠后,妊娠黄体和胎盘大量分泌孕激素,使卵巢的周期性变化停止,不再排卵,也不再出现_________。
【单选题】妊娠期乳腺变化下列哪项正确( )
A.
胎盘分泌孕激素刺激乳腺管发育
B.
胎盘分泌雌激素刺激腺泡发育
C.
妊娠期无乳汁分泌的可能与大量雌孕激素有关
D.
乳腺的发育不需其他激素参与
E.
妊娠后期挤压乳房时，亦无初乳溢出
【单选题】Down on the brick floor of the University of Maryland’s Davidge Hall, a noted professor of medicine is about to perform a most unusual postmortem.Although this domed amphitheater with its steeply risi...
A.
the famous internist Faith Fitzgerald gives a lecture
B.
Mozart is the subject of the conference and his decreased body is presented for analysis
C.
it ends with a string quartet, and there is no presence of the studied object: the decreased remains
D.
a string quartet is played throughout the conference
【单选题】In the conclusion of the prose______, the author points out that the root of poverty is the private ownership of social wealth.
A.
Advancement of Learning
B.
Utopia
C.
Tamburlaine
D.
Henry IV
【单选题】A far-reaching ____________ campaign began in China following the conclusion of the 18th National Congress of the Communist Party of China in 2012.
A.
corruption
B.
corrupt
C.
anti-corrupt
D.
anti-corruption
【单选题】补充习题：Down on the brick floor of the University of Maryland’s Davidge Hall, a noted professor of medicine is about to perform a most unusual postmortem.Although this domed amphitheater with its steeply...
A.
miliary fever
B.
rheumatic fever
C.
kidney disease
D.
delirium
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