题目内容

大黄应用多少量有致泻作用( )。

A. 小剂量
B. 中等剂量
C. 大剂量
D. 微小剂量

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宠物有机磷中毒时，常用解毒药是( )。

A. 碘解磷定
B. 葡萄糖
C. 美兰
D. 肾上腺素

亚硝酸盐中毒是由于妨碍了( )。

A. 血红蛋白携氧
B. 组织细胞呼吸
C. 肺泡换气
D. 泌尿系统排尿

Vocabulary & StructureDirections: In this section, there are 10 incomplete statements. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A, B, C and D.When I am awaybusiness, I contact my office every day by email.

A. with
B. of
C. on
D. to

The decision about such a big project can not be madeeach memeber of the board agrees.

A. if
B. unless
C. though
D. as