_____ in some rural schools that the teacher is even unable to walk through the rows of desks. [ ]

A. The classroom is as crowded

B. So crowded is the classroom

D. As crowded the classroom is

D. The classroom is such crowded

需去油制霜的药物是

A．杏仁

B．巴豆

C．栀子

D．肉豆蔻

E．桃仁