选择题：he failed, he won't give up his ideals.

题目内容：

he failed, he won't give up his ideals. he failed, he won't give up his ideals. A if
B even if
C whether
D when

参考答案：

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介质密度和纵波波速的乘积称为A 冲量B 波阻抗C 动量D 反射系数

She _______ collecting stamps very much.A likesB lovesC enjoysD longsE looks lik

操作系统作业管理的主要功能是( )A 作业的调度与控制B 作业的提交C 作业准备D 编制程序

Autumn's parents didn't permit her to date and insisted Autumn ________ Japanese