设有如下语句：
执行结果是（     ）。
A、den  
B、stu 
C、ent 
D、uden

土壤微生物特性不包括( )。 A. 数量 ...

单项选择题土壤微生物特性不包括( )。 A.
数量 B.
活性 C.
种群 D.
大小

（  ）内螺纹的牙顶用细实线绘制。 正确 ...

判断题（  ）内螺纹的牙顶用细实线绘制。
正确
错误

You didn't take his advice. ________ his advice, you __...

单项选择题You didn't take his advice. ________ his advice, you ________ such a mistake.
A、Had you taken, wouldn't have made
B、If you had taken, would make
C、Were you lo take, shouldn't have made
D、Have you taken, won't have made