性别也是一种性状，是发育的结果，所以性别分化受（）的控制，也受的影响。
参考答案：染色体；环境
My mother asked me______ enter my room.
A．whether she could
B．when could she
C．that she can
D．how can she
人类朊病毒病通常有哪几种传播形式？
