问题
单项选择题
不会引起催化剂中毒的是（）。
A、丙烷
B、乙炔
C、甲醇
D、丙烯
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
不会引起催化剂中毒的是（）。
A、丙烷
B、乙炔
C、甲醇
D、丙烯
参考答案：A
| 选择方框中的句子补全对话，有两项是多余的 | |
A: Hello, Li Lei. B: Hi, Jim, this is my friend, John. A: Hello, John. Nice to meet you. C: Nice to meet you, too. A: John, l C: I'm from Canada. 2 A: I'm from the United Kingdom. 3 C: Yes, I do. And I can speak a little Chinese, too. A: 4 C: I study in No. 9 Middle School. A: 5 C: It's great. Teacher and my classmates are good to me. 1._ ___ 2. 3._____ 4.____ 5._ __ |