Peter speaks Chinese well, but of course not ________ a local speaker in China.
A:so well as
B:better than
C:as good as
D:much well than
小明用显微镜观察材料时,发现视野中有一污物存在。于是,他移动玻片标本,污物不动;换用洁净的目镜后,污物仍然存在。据此判断污物最有可能在( )
用两种烯烃CH2=CH2和RCH=CHR作单体进行聚合反应时,产物中含有( )
若函数y=logax(a>0,且a≠1)的图象如图所示,则下列函数图象正确的是( )