18-8铬镍不锈钢中铬的含量为 （）
A.17%～19%
B.9%～16%
C.8%～12%
D.7%～9%
E.27%～29%
参考答案：A
It’s an either-or situation—we can buy a new car this year or we can go on holiday but we can’t do .
A．others
B．either
C．another
D．both
上午10点30分，时针与分针成______度的角．
