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问题 单项选择题

滑动轴承的轴瓦接触点选择，当轴承转速为500～1000r/min，其轴瓦接触点应为（）点/25mm×25mm。

A、3～5

B、10～15

C、15～20

D、20～25

答案

参考答案：C

单项选择题

Helen and Martin

With a thoughtful sigh, Helen turned away from the window and walked back to her favourite armchair. (51) her brother never arrive For a brief moment, she wondered if she really cared that much.

Over the years Helen had given (52) waiting for Martin to take an interest in her. Her feelings for him had gradually (53) until now, as she sat waiting for him, she experienced no more than a sister’s (54) to see what had (55) of her brother.

Almost without (56) , Martin had lost his job with a busy publishing company after spending the last eight years in New York as a key figure in the US office. Somehow the two of them hadn’t (57) to keep in touch and, left alone, Helen had slowly found her (58) in her own judgement growing. (59) the wishes of her parents, she had left university halfway (60) her course and now, to the astonishment of the whole family, she was (61) a fast-growing reputation in the pages of respected art magazines and was actually earning enough to live (62) from her paintings.

Of course, she (63) no pleasure in Martin’s sudden misfortune, but she couldn’t (64) looking forward to her brother’s arrival with (65) satisfaction at what she had achieved.

54().

A. wonder

B. idea

C. curiosity

D. regard
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单项选择题

有关阿尔茨海默病（AD）的临床表现以下哪项错误（）。

A.AD通常起病隐袭，波动性发展

B.由发病至死亡平均约8－10年

C.认知功能减退为主要症状之一

D.可表现多种精神症状

E.人格改变往往出现在疾病的早期，近记忆障碍常为首发症状
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