题目内容

简述操作性条件作用的基本规律。

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氢气作为汽车燃料最大的问题是制取与携带。

A. 正确
B. 错误

下列哪个因素在定量测定中属于非生理性干扰因素()

A. 营养
B. 溶血
C. 年龄
D. 运动
E. 生理节律变化

原发性肾病综合征在激素无效后,可加用的药物为()

A. 环孢素
B. 硫唑嘌呤
C. 苯丁酸氮芥
D. 环磷酰胺
E. 以上都是

Which two statements are true about WHERE and HAVING clauses? ()

A WHERE clause can be used to restrict both rows and groups.
B. A WHERE clause can be used to restrict rows only.
C. A HAVING clause can be used to restrict both rows and groups.
D. A HAVING clause can be used to restrict groups only.
E. A WHERE clause CANNOT be used in a query if the query uses a HAVING clause.
F. A HAVING clause CANNOT be used in subqueries.

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