在保险期限内，被保险机动车所有权转移，应当办理交强险合同变更手续，且交强险费率（）。
参考答案：不浮动
---What do you think of your new English teacher？
--- She was well prepared for her first lesson and left us a good________.
A．expression
B．instruction
C．appearance
D．impression
砂土的饱和度为57%，则该土为（）。
A.饱和
B.稍湿
C.很湿
D.干燥
