收涩药味多酸涩,性温或平。
由其归经不同可分为()
A.止咳平喘药
B.敛肺涩肠药
C.固表止汗药
D.固精缩尿药
E.健脾止泻药
F.收敛止泻药
参考答案:B, C, D
—Sally failed in this math test. She is very sad now.
—Let’s go and_______.
A.laugh at her
B.cheer her up
C.let her down
D.learn from her
通过什么方法可提高石油焦的实收率?