A:do his homework
B:do his homeworks
C:does his homework
D:does his homeworks
下列化学实验基本操作图示正确的是( )
筛管的特点是( )
你是否赞同冰点契约的看法?请结合所学知识进行评析。
—Sorry, sir.I could have turned up on time, but I in heavy traffic.