高炉煤气的可燃成分比焦炉煤气多。
参考答案:错
He is badly ill. He eats _____.
A.little and little
B.small and small
C.less and less
D.smaller and smaller
行车中的车辆安全检视属于()
A.一级维护
B.二级维护
C.日常维护