1. [单选题]裸子植物的胚乳是( )。
A. 孢子体世代，核相3n
B. 配子体世代，核相3n
C. 孢子体世代，核相2n
D. 配子体世代，核相n
2. [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
