How many books do you have? ( )
A:All right.
B:Thirty.
C:on your head.
—What are you going to do tomorrow?
—Well, it the weather.
最科学证明地球的真实形状的事件是( )
2003年春,广东、北京等地发生了非典型性肺炎,其原因是由病毒感染引起的。不少群众购买醋精用于室内消毒灭菌,这是因为醋精
读某地景观图,判断以下说法中,正确的是( )