单项选择题

Sudden disastrous external stress such as in severe automobile accidents, airplane crashes, and underwater explosions may cause death through rupture of the major arteries.

A．impairment
B．severity
C．fracture
D．contraction
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单项选择题
Lebanon is one of the few countries in the Middle East with a comparatively well- developed labour movement. Trade unions have secured some tangible gains, such as fringe benefits and better working conditions.
A．substantial
B．trivial
C．momentous
D．crucial
单项选择题
Every community requires a wholesome, dependable supply of water, and every community generates liquid and solid wastes.
A．considerable
B．healthful
C．immediate
D．secure
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