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慢性钝痛不宜选用吗啡的主要原因是() A对钝痛效果较差 B治疗量抑制呼吸 C容易导致便秘 D容易成瘾 E以上皆不是
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【单选题】What is true of human sleep?
A.
Most people need less sleep when they grow older.
B.
Most people need seven and a half hours of sleep every night.
C.
On average, people in the US today sleep less per night than they used to.
D.
For most people, less than six hours of sleep on a typical work night is enough.
【单选题】What，according to the writer，is one of the most important tasks of our time?
A.
To keep people from agin9．
B.
To practice birth．contr01．
C.
To make people still stronger．
D.
To do away with starvation and disease．
【简答题】Most people do not equate wealth with a big house or yacht(游艇). In fact, only 7% of people surveyed associate wealth with material possessions like cars, houses and boats. Rather, to many, being rich ...
【简答题】What do the speaker most probably do in the future?
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