未分类题请阅读短文,完成第题。
单项选择题用裸露爆破法破碎大块,个别飞石对人员的最小安全距离是( )。
未分类题A University of California advisor said__________. 查看材料
未分类题What type of approach does the student apply to listening according to what he describes? __________'When I listen to English tapes, I am always worried about my limited vocabulary. I tend to figure out its actual meaning when coming across an unknown word, so that stop makes me miss the next part of the speech.'
未分类题What‘s the starting point and destination of English course?