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【单选题】
甲型肝炎病毒属于A.
嗜肝DNA病毒属
B.
嗜肝RNA病毒属
C.
肠道病毒属72型
D.
嵌杯病毒科
E.
黄病毒科
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【单选题】Where they live?
A.
does
B.
do
C.
are prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
【简答题】的椎管内作用机制是（）|强阿片类镇痛剂的作用机制是（）|曲马朵的作用机制是（）|氯胺酮的椎管内作用机制是（）|非甾体抗炎镇痛剂的作用机制是（）A. 通过抑制环氧化酶活性，干扰前列腺素的合成产生止痛作用B. 通过对阿片受体的弱激动作用和对去甲肾上腺素及5－羟色胺再摄取的抑制发挥止痛作用C. 通过激动体内的阿片受体产生强烈的镇痛作用D. D.通过阻断脊髓内N－甲基－D－门冬酸（NMD受体和竞争性...
【简答题】A．It depends on their age. B．It depends on where they live. C．It's a matter of personal choice. D．It's a matter of social custom.
【单选题】To find out where they live you ask them:
A.
Where you live?
B.
You live where?
C.
What's your address?
D.
Where do you live?
【单选题】Cactuses(仙人掌)live in dry areas. They may not get much water where they live. The cactus' long roots lie near the surface of the ground. They can get water from desert rains. And since the roots have b...
A.
The leaves
B.
The stems
C.
The needles
D.
The roots
【简答题】A．It is only forty miles from where they live. B．It is a small one with a two-bedroom house. C．It was bought at a price lower than expected. D．It has a large garden with fresh vegetables.
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