问题
选择题
单项选择。
— How many ____ do you have?
— Only one. [ ]
A. shirt
B. a shirt
C. some shirts
D. shirts
答案
答案：D
搜题请搜索小程序“爱下问搜题”
单项选择。
— How many ____ do you have?
— Only one. [ ]
A. shirt
B. a shirt
C. some shirts
D. shirts
答案：D
CH3CH2OH（g）△H ＜0，达到平衡时，要使反应速率加快，同时乙烯的转化率提高，应采取的措施是