横生胚珠
参考答案：
胚珠一侧生长较快，胚珠横卧，珠孔、珠心纵轴和合点所连成的直线与珠柄成直角，这样的胚珠称为横生胚珠。如花生、锦葵和梅等的胚珠。
When we got to the theatre, the play _______ for five minutes. [ ]
A. has begun
B. had begun
C. was on
D. had been on
期末一般没有余额的账户是( )。
A．库存商品
B．应交税金
C．制造费用
D．预提费用
