单项选择题

A coastguard does NOT require the life preserver to be made ______.

A．with as few strings as possible
B．capable of being worn on both sides
C．according to each wearer's size
D．comfortable and light to wear
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单项选择题
The word chilling (Sent. 3, Para. 2) most probably means ______.
A．discouraging
B．convincing
C．misleading
D．interesting
单项选择题
What would happen if a person were supported by the life preserver in a wrong position
A．The waves would move him backwards.
B．The water would choke him.
C．He would immediately sink to the bottom.
D．He might be exhausted or unconscious.
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