1. [单选题]We can infer from the passage that the water table lies ( ) ．
A. between the topsoil layer and the subsoil layer
B. in the subsoil layer above bedrock
C. between the subsoil layer and bedrock
D. in the bedrock layer beneath the subsoil
2. [单选题]根与茎的木栓形成层最早起源于中柱鞘。( )
A. 正确
B. 错误
3. [单选题]按崩解时限检查法检查，普通片剂应在多长时间内崩解（ ）。
A. 15min
B. 30min
C. 60min
D. 20min
E. 10min
