题目内容

NULL与数字类型的0或字符串类型的空字符串是完全相同的。

A. 对
B. 错

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局部变量以“@”开始。

A. 对
B. 错

_________(view) from a distance, the island looks like a cloud.

Althought _______________(build) before the war, the engine is still in perfect condition.

He entered the room, his nose__________with cold. (鼻子已经冻红了）