只要发挥教师的主导作用，就能取得好的教学效果。
参考答案：错
The teacher commanded that the exercises _______ in an hour.
A. was finished B . were finished C should finish D. be finished
对于立井井筒基岩的短段掘砌作业，井壁现浇混凝土衬砌时通常采用（）模板。
A.拆卸式金属
B.伸缩式金属活动
C.整体滑升
D.预制混凝土拼装
