题干
- I'm afraid that I can't pass the English exam next week.
- _____! Just try your best.
A：Sure
B：Never mind
C：Of course
D：You are welcome.
答案(点此获取答案解析）
B
- I'm afraid that I can't pass the English exam next week.
- _____! Just try your best.
A：Sure
B：Never mind
C：Of course
D：You are welcome.
、②）NH4HSO4、③H2SO4溶液，下列说法正确的是