安装工程一般以定额（）为基础计算各项费用。
A、直接费
B、材料费
C、机械台班使用费
D、人工费
参考答案：D
Our school doesn't _____ students' staying in the classroom too long. We think they should have
time for sports. [ ]
A. advocate
B. admit
C. assess
D. approach
角膜反射消失见于()
A．嗜睡
B．昏睡
C．意识模糊
D．浅昏迷
E．深昏迷
