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【判断题】
5-1.污水的采样位置应在采样断面的中心,水深小于或等于1米时时,在水深的1/4处采。
A.
正确
B.
错误
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举一反三
【简答题】英译汉:They convince you that you and what you are doing actually matter.
【单选题】To find the articles about using Chinese herbal medicine in the treatment of lung neoplasms,if you wanna expand the expressions for the concept "lung neoplasms", the queries could be .
A.
Chinese herbal medicine AND Lung AND neoplasms AND (adenocarcinoma OR squamouscarcinoma OR tumors )
B.
Chinese herbal medicine AND Lung AND adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms
C.
(adenocarcinoma AND squamouscarcinoma AND tumors AND neoplasms)AND Lung AND Chinese herbal medicine
D.
(adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms)AND Lung AND Chinese herbal medicine
【单选题】To find the articles about using Chinese herbal medicine in the treatment of lung neoplasms,if you wanna expand the expressions for the concept "lung neoplasms", the queries could be .【single choice】
A.
Chinese herbal medicine AND Lung AND neoplasms AND (adenocarcinoma OR squamouscarcinoma OR tumors )
B.
Chinese herbal medicine AND Lung AND adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms
C.
(adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms)AND Lung AND Chinese herbal medicine
D.
(adenocarcinoma AND squamouscarcinoma AND tumors AND neoplasms)AND Lung AND Chinese herbal medicine
【多选题】To find the articles about human embryonic stem cells, which ones of the following search fields could be used?【 multiple choice 】
A.
Abstract
B.
MeSH major topic
C.
Other Term
D.
Text Word
【单选题】对于指针变量,实际存在哪些基本要素
A.
变量的地址
B.
变量的值
C.
变量名的值 , 变量名
D.
变量名的值 , 变量名 , 变量的地址
【多选题】To find the articles about human embryonic stem cells, which ones of the following search fields could be used?
A.
Abstract
B.
MeSH major topic
C.
Other Term
D.
Text Word
【单选题】To find the articles about using Chinese herbal medicine in the treatment of lung neoplasms,if you wanna expand the expressions for the concept "lung neoplasms", the queries could be .【 single choice ...
A.
Chinese herbal medicine AND Lung AND neoplasms AND (adenocarcinoma OR squamouscarcinoma OR tumors )
B.
Chinese herbal medicine AND Lung AND adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms
C.
(adenocarcinoma AND squamouscarcinoma AND tumors AND neoplasms)AND Lung AND Chinese herbal medicine
D.
(adenocarcinoma OR squamouscarcinoma OR tumors OR neoplasms)AND Lung AND Chinese herbal medicine
【单选题】设函数 在点 处的某个邻域内有定义,则 存在是 在点 处可导的( )
A.
充分而非必要
B.
必要而非充分
C.
充分必要
D.
既非充分又非必要
【单选题】函数 在点 处可导是 在点 处有定义的( )
A.
充分条件
B.
必要条件
C.
充要条件
D.
既不是充分条件,也不是必要条件
【判断题】函数y=f(x)在x 0 点可导的必要条件是f(x)在点.x 0 处必有定义.(    )
A.
正确
B.
错误
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