题目内容

The protein, as it turns out, is essential to the integrity of the basement membrane of the skin. (par.2, p30)

A. completely helpful
B. extremely useless
C. completely necessary
D. extremely normal

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Along with the shift in perspective, my story has been turned on its head. (par.1, p31)

A. completely similar
B. completely different
C. completely abnormal
D. completely interesting

Of course, there is always the glimmer of hope that someone in the audience will have a brainstorm, a flash of medical insight. (par.3, p33)

A. faint sign
B. small evidence
C. big sign
D. big evidence

定义类的关键字为________。

5．类的封装是指在定义一个类时，将类中的属性私有化，即使用________关键字来修饰。