驾驶人频繁变更车道不属于驾驶陋习。
参考答案:错
瓦斯爆炸的界限并不是固定不变的,()可使瓦斯爆炸界限扩大。
A.惰性气体的混入
B.可燃气体的混入
C.煤尘的混入
D.瓦斯与空气的混合气体温度高
Many children _____ your age are always ____ a good mood to do the things they’re interested in.
A.at, in
B.of, in
C.at, on
D.of, with