特种设备的种类有哪些?
参考答案:
目前国家规定的特种设备有:电梯、起重机、厂内机动车辆、客运架空索道、游乐设施和防爆电器。
写出下列短语的缩写形式。
1. I am = 2. we are = 3. they are = 4. what is =
5. where is = 6. he is = 7. let us = 8. who is =
9. my name is =
最常引起气管向健侧移位的病变是()
A.肺不张
B.肺炎
C.肺癌
D.胸膜粘连
E.胸腔积液