有关化学用语正确的是（ ）
A．四氯化碳的电子式：
B．氢氧根的电子式：
C．乙烯的最简式（实验式）：C2H4
D．乙醇的结构简式：CH3CH2OH
答案：D
根据句意及首字母提示完成单词。
1. Oh, I am late. I have to h_____ up.
2. I don't have breakfast. I'm h_____.
3. —What colour is gold?
—It's g____.
4. Don't pull the door. P____it, please.
5. She p____ up the biggest bowl, but she didn't like it.
下面哪些疾病可引起支气管狭窄及闭塞
A．支气管腺癌
B．异物
C．支气管周围肿瘤压迫
D．由感染造成的肉芽肿，瘢痕
E．支气管癌
