【单选题】【消耗次数：1】
药物的血浆半衰期是指
①
药物的稳态浓度下降一半的时间
②
药物有效浓度下降一半的时间
③
药物作用强度下降一半的时间
④
药物血浆浓度下降一半的时间
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相关题目
【单选题】
药物的半衰期是指
①
药物的血浆浓度下降一半所需的时间
②
药物的稳态血药浓度下降一半所需的时间
③
药物的有效血药浓度下降一半所需的时间
④
药物的组织浓度下降一半所需的时间
⑤
药物的最高血药浓度下降一半所需时间
【单选题】
一等直杆在两端承受轴向拉力作用，若其一半段为铜，另一半段为铝，则两段的（）。
①
应力相同，变形相同
②
应力相同，变形不同
③
应力不同，变形相同
④
应力不同，变形不同
随机题目
【单选题】
It s surprising that this idea took so long to _______.
①
add to
②
dispose of
③
catch on
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absorb in
【单选题】
The problem is （） it may take time for new facts to become available.
①
that
②
how
③
what
④
if
【单选题】
Mr. Clinton, together with his wife and children, _______ going to the park next weekend.
①
is
②
has
③
are
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was
【单选题】
Since evidence of the fraud came to light, Congress has been demanding a ______ investigation.
①
horrible
②
thorough
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thoughtful
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weird
【单选题】
If it were not for the fact that he was a millionaire, she ____ him.
①
might never marry
②
will never marry
③
would never have married
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would never marry
【单选题】
On his next birthday he （） married for ten years.
①
has been
②
will be
③
will have been
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would have been
【单选题】
Hi, welcome back! Had a nice trip?____________
①
Oh, fantastic! Fresh air, and sunshine every day.
②
Come on, I’ve got lots of fun.
③
By the way, I don’t like Saturdays.
④
Well, I’ll look forward to your phone call.
【单选题】
What（）next will be discussed at the next meeting.
①
to do
②
is doing
③
will do
④
shall we do