使用车用乙醇汽油是否会损坏汽车燃油系统的金属零部件？
参考答案：
不会。因乙醇汽油中加入了金属腐蚀抑制剂。
This school doesn't have ______ it did ten years ago. [ ]
A. so many students as
B. many as students as
C. such few students as
D. so many as students as
矿井地面（）等处的防火措施和制度，必须符合国家有关防火规定。
A.建筑物
B.煤堆
C.矸石山
D.木料场
