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【判断题】
套管冷凝器中冷热流体的沿程阻力都比较大，所以多用于单机制冷量小于40kW的小型氟里昂制冷机组中。A.
正确
B.
错误
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【单选题】We all associate colors with feelings and attitudes. In politics, dark blue often means 'tradition', and red means 'social change'. But blue can also mean sadness (I'm feeling blue). White is often fo...
A.
the association of day and night with passivity and action in ancient time
B.
the association of black with funerals in western Europe
C.
the association of white with purity in some countries
D.
the association of red with joy in China
【单选题】A country's native politics ______.
A.
cannot be forcibly changed by the U.N.
B.
are often changed by the U.N.
C.
must be controlled by U.N.
D.
are not allowed to benefit from U.N.'s advice of assistance
【单选题】It can be inferred from the last paragraph that
A.
women are often involved in politics in Germany.
B.
in Germany, there are now some female leaders, including Merkel.
C.
Merkel becomes a chancellor because she is no longer a girl.
D.
it does need a lot to become a female chancellor in Germany.
【单选题】We all associate colors with feeling and attitudes. In politics dark blue often means 'tradition', and red means 'social change'. But blue can also mean sadness (I'm feeling blue), white is often for ...
A.
the association of day and night with passivity and action in ancient time
B.
the association of black with funerals in western Europe
C.
the association of white with purity in some countries
D.
the association of red with joy in China
【简答题】International politics is often defined as politics in theabsence of a common ______ , politics among entities with no _____ above them.
【判断题】数据模型是数据库管理系统中用于提供信息数据表示和操作手段的形式构架，数据模型通常由数据结构、数据操作和完整性约束3个部分组成，也称数据模型三要素。
A.
正确
B.
错误
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