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问题
多项选择题
道路运输中所指的“道路”，包括（）
A.城市道路
B.城市间道路
C.城乡间道路
D.乡间道路
答案
参考答案：A, B, C, D
选择题
Ever since my brother graduated from the university, he _______ in the present company for 15 years and he is now chief engineer of the company.
A. worked
B. has been working
C. is working
D. works
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问答题 简答题
什么是固定坑线开拓、移动坑线开拓？
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