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轴的强度计算主要有哪几种方法?

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在社交礼仪中,择友都有哪些标准?

Our __ sensitivity decreases with age. By age 60, most people have lost 40 percent of their ability to smell and 50 percent of their taste buds.

A. sensible
B. senseless
C. sensitive
D. sensory

装设于地面的配电变压器应设有安全围栏,并悬挂“止步,高压危险!”等标示牌。()

A. 正确
B. 错误

翻译:客有吹洞箫者,倚歌而和之。其声呜呜然,如怨如慕,如泣如诉,余音袅袅,不绝如缕。

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