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【单选题】
药物在胎盘运转时发生生物转化的主要原因是A.
母体肝药酶活性提高
B.
胎儿肝药酶活性提高
C.
胎盘中有具有代谢功能的酶系统
D.
药物杂胎盘中停留时间过长
E.
胎儿血循环中有药物代谢的酶系统
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【单选题】A move is ____ in Congress to oppose U.S. help.
A.
in the way
B.
under way
C.
out of the way
D.
across the way
【简答题】结构或构件抵抗破坏的能力通常称为 ;抵抗变形的能力称为 ;保持其原有平衡形式的能力称为 。
【单选题】Two chambers of the U.S. Congress are the House of Representatives and the Senate.
A.
Y
B.
N
C.
NG
【简答题】信息率失真理论是量化、数模转换、频带压缩和（）的理论基础。
【单选题】听力原文： President Bush has asked Congress to ratify an agreement to normalize U.S. trade with Vietnam. The president sent the agreement negotiated in the last year of the Clinton administration to Congr...
A.
The U.S. Congress has ratified the agreement to normalize U.S. trade with Vietnam.
B.
The agreement was negotiated in the last year.
C.
President Bush wanted to normalize overall ties between U.S. and Vietnam.
D.
The agreement has strong support among Vietnam War veterans.
【单选题】U.S. President urged the U.S. Congress to play a key role in the fight against ______ in Africa.
A.
starvation
B.
AIDS
C.
discrimination
D.
unemployment
【简答题】信息论失真理论是量化、数模转换、频带压缩和_______的理论基础
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