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【单选题】
医学上95%的正常值范围是( )A.
X± 1.96S
B.
X±2.58S
C.
X＋ 1.96S
D.
X－ 2.58S
E.
X± S
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皮皮学刷刷变学霸
举一反三
【单选题】The Virgin Islands are located ______.
A.
in the Gulf of Mexico
B.
in the Pacific Ocean
C.
in the North Sea
D.
in the Caribbean Sea
【单选题】Which. of the following is NOT the reason why people prefer to use virgin' materials than use secondary ones?
A.
Production costs do not include the true costs of environmental impact.
B.
There axe subsidies to virgin materials.
C.
Using virgin materials can protect environment.
D.
The secondary materials are more expensive.
【简答题】The virgin forest with its richness and variety of trees was a veritable real treasure-house which extended from Maine all the way down to Georgia. 请将上面这段话翻译成中文，谢谢！
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