经营者因提供假冒伪劣商品承担加倍赔偿责任的,不得以消费者购买商品数量过多为由免责。
参考答案:对
This building is both a secret and a mystery. No one shall be admitted into it ______ he can give the right password.
A.if
B.as
C.since
D.unless
风筒末端距工作面的距离:岩巷不大于()米,煤巷不大于()米。