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【单选题】
塑料棚内于午后 2-4 小时气温开始下级,日落后降温迅速,比露地降温快,经常会出现棚内气温反而低于棚外的现象,称为 ( ) 。A.
放热现象
B.
温度逆转现象
C.
温差倒挂现象
D.
缝隙散热现象
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举一反三
【简答题】蜗杆与蜗轮的轴线在空间交错成（）角。
【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】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】The U.S. Congress is the ____ of the British Parliament.
A.
copy
B.
contrary
C.
counterpart
D.
simulation
【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
【单选题】听力原文： The U.S. Botanic Garden is America's plant museum. (26) Congress established the Botanic Garden as a center for the science of growing things. But the Garden is also a center of beauty. (28) The...
A.
For scientific research on the growing things.
B.
For make a center of beauty.
C.
For attracting more children to visit.
D.
For improving the environmental conditions.
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