湿式自动喷洒消防给水系统具有()特点。
A.成本低
B.启动迅速
C.灭火及时
D.维护保养方便
参考答案:A, B, C, D
猫眼疮的特点是:
A.水痘B.传染性软疣C.扁平疣D.天疱疮E.带状疱疹
—Mary,new copies of 《Harry Potter》 are on sale now.
—Great! Let’s go and buy this afternoon.
A.it
B.that
C.any
D.one