皮皮学，免费搜题
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【单选题】
某药半衰期为6小时，一天用药4次，几天后血药浓度达稳态（）A.
1～2天
B.
5天
C.
0.5天
D.
3～4天
E.
6～8天
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】John: What plastic products do you have in mind that are easy to recycle? Tom: Shampoo bottles, detergent bottles, medicine bottles, food containers, etc. They are all easily collectable and reusable....
A.
Not too bad
B.
You're right there
C.
Something is wrong
D.
It's a new idea
【单选题】What kind of products do you think particularly interested ?
A.
are they, in
B.
they are, in
C.
are they, /
D.
they are, /
【多选题】What type of hair products do you usually use?
A.
Shampoo
B.
Hair conditioner
C.
Hair spray
D.
Hair dye
E.
Others
【简答题】含碳量小于1.7%的铁碳合金称为钢，含碳量在1.7-4.5%的铁碳合金称为()。
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