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问题 选择题

.Slang words (俚语) are made _____ special groups,such as workers and musicians.

A．of

B．into

C．from

D．by

答案

答案：D

介词词义辨析题。A.of 关于    B.into 进入   C.from 来自D.by 由… 句意：俚语是由特殊的群体像工人、音乐家制造出来的。 根据语境选D

单项选择题

根据有关规定，私自买卖外汇、变相买卖外汇或者倒买倒卖外汇的，外汇管理机关可以给予罚款处罚。该罚款的金额范围是( )。

A．违法所得1倍以上5倍以下
B．10万元以上50万元以下
C．违法外汇金额30%以上3倍以下
D．违法外汇金额20%以上5倍以下
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单项选择题

(五)


Space travel is definitely bad for astronauts’ bones, reducing their bone density after only a month of weightlessness, according to French research published on Friday.
Laurence Vico and his fellow workers at St Etienne University called for more research into the effects of microgravity, after their study of 15 astronauts from the Russian MIR station showed bone loss continued throughout space flights.
"Bone loss was especially striking in four astronauts, " the scientists reported in the Lancet Medical Journal.
They measured the Bone Mineral Density(BMD) of bones in the forearm and lower leg of the astronauts who had spent one to six months in space.
The BMD loss was significant in the tibia of the lower leg, a weight-bearing bone, but barely changed in the radius of the forearm. "Our results indicate the need to investigate not only different bones, but also different areas of the same bone since not all sites of the skeleton are similarly affected by space conditions, " they added.
Without gravity the body isn’t bearing any weight so there is no need for calcium which makes bones p, and it becomes empty into the bloodstream.
The research team suggested in future scientists should try to determine if the loss of bone density was only on weight-bearing bones on longer flights, also the possible recovery after returning to Earth.

Scientists have found that ______ .

A．the BMD loss may cause serious illness to astronauts

B．the BMI) loss may cause some change in astronauts’ bodies

C．astronauts shouldn’t care about the BMD loss

D．astronauts should take some calcium before space travel
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