A:{0}
B:{y|y2=0}
C:{x|x=0}
D:{x=0}
You are ___________ to type quickly when talking to each other on QQ so the other person doesn't get bored.
下列说法正确的是( )
如图所列的六种氨基酸,其中每种只有一个.据题意回答下列问题:
你告诉朋友这本书是红色的,可以说