专性需氧的革兰阳性菌是
A．霍乱弧菌
B．结核分枝杆菌
C．布氏杆菌
D．白喉棒状杆菌
E．链球菌
参考答案：B
选择正确的单词或词组填空。
1. There are some pears (in / on) the tree.
2. There (is /are) many fish in the river.
3. Are there (some /any) flowers in the village?
4. I can run (in / on) the grass.
5. There are (no / on) tall buildings in the village.
机车在车场调车组列项车时，跟车信号工必须在列车的前方（）。
A.瞭望
B.等待
C.不管
