It can be inferred from the passage that______.A．the author"s silence made Ms. A quite dis

膳食营养素参考摄入量是

A.EAR

B.RNI

C.DRI

D.AI

E.UL

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Which of the following is CORRECT about Ms. A？

A．She accepted the author"s request of interview.

B．She lived alone without any relatives or friends.

C．She was the most serious patient in the hospital.

D．She lived with three other patients in one room.

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7个月婴儿发热、呕吐、水样便，每天7~8次，已三天，于11月15日入院。体查：体温38.5℃，轻度脱水貌，咽部充血，心、肺（-）肠鸣音稍亢进。大便镜检脂肪球++。最可能的诊断是

A、上呼吸道感染

B、生理性腹泻

C、饮食性腹泻

D、病毒性肠炎

E、侵袭性细菌所致的肠炎

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What is the most frightening aspect of the chemicals in the world？

A．Over 143,000 chemicals have been produced.

B．Chemicals are overused in many areas of our life.

C．The chemicals" effects are not clearly known.

D．Human beings become dependent on chemicals.

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如果变量x 的平均数和标准差是X，s，若每个变量值都加一个常数4，变成新的变量为y，那么y 的平均数和标准差是

A、X+4 和s+4

B、X+4 和s

C、X和s+4

D、X和s

E、X+4 和2+s

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