— Are you Helen?
— ________________.
A:Yes, I'm.
B:No, I'm not.
C:Yes, you are.
D:No, you aren't
Some visit the Great Wall every year.
拔____ 峡____ 峰____ 衬____
拨____ 侠____ 锋____ 趁____
下列有关地球自转方向的图示,正确的是( )
下列性质中,菱形具有但矩形不一定具有的是( )