颈椎病引起头晕、头痛的常见的类型为（）。
A.神经根型
B.脊髓型
C.交感神经型
D.椎动脉型
E.混合型
参考答案：D
There is a river around our town. It is about ______ long.
A．6 hundreds kilometers
B．6 hundred kilometers
C．6 hundreds kilometer
D．6 hundred kilometer
—How do you spell key?
—_____.[ ]
A. It's a key.
B. It's my key.
C. Yes, K-E-Y.
D. K-E-Y.
