一级维护、二级维护周期的确定，应以汽车（）为基本依据。
A.技术状况
B.行驶里程
C.外观状况
D.行车安全
参考答案：B
连词成句。
1. does, sing, he, well
__________________________________?
2. how, students, many, there, are
3. bring, food, water, and, you, with
__________________________________.
4. kind, of, this, paper, feels, soft, very
5. a, watch, few, students, every. it, day, only
适合厌氧菌检验的标本是
A．鼻咽拭子
B．肛拭
C．中段尿
D．前列腺液
E．深部脓肿穿刺液
