下列说法正确的是( )
A.H2的摩尔质量是2g
B.1mol氧的质量是16g
C.氧气的摩尔质量是32g/mol
D.2gH2含1molH
答案:C
Xu Qian is a funny girl. She loves to _______ jokes. [ ]
A. speak
B. say
C. tell
D. talk
初唐四杰是指卢照邻、骆宾王()。
A.杨炯、王勃
B.陈子昂、王维
C.高适、王勃
D.杨炯、王维