4.The man does not have his favorite reading because he _______
A. also likes music
B. often changes his interest in reading
C. he spends much of his spare time reading
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5.Which of the following is NOT true?
A. The woman likes jazz music.
B. The woman likes Mozart and Beethoven.
C. The woman thinks rock and roll too noisy.
平键链接的配合尺寸为（ ）
A. 键高
B. 键宽
C. 轴槽深
D. 轮毂槽深
内、外花键小径的极限尺寸遵守（ ）原则。
A. 包容
B. 最大实体
C. 最小实体
D. 独立
矩形花键中系列键高尺寸比轻系列大，故承载能力较强。
A. 对
B. 错
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