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【单选题】
关于Python变量的使用，下列说法错误的是A.
变量不必事先声明
B.
变量使用前需赋值
C.
变量无须指定类型
D.
变量一旦创建任意地方都可使用
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【简答题】______ may receive some financial from the college.
【单选题】Top officials from the Ministry of Education announced last week that they will make a standard plan to calculate the education costs of university students. Aimed at stopping colleges from overchargi...
A.
The Problems of Chinese Universities.
B.
Chinese Students Pay for Universities' Expansion.
C.
A Standard Plan.
D.
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【单选题】听力原文：America's Central Bank is part of a larger financial system called the United States Federal Reserve System. It is not a single bank, but a banking system with operations that are both public and...
A.
Controlling the flow of money in the economy.
B.
Overseeing the activities of banks.
C.
Producing and distributing bank notes and coins.
D.
Contributing to the maintenance of a stable financial system.
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