评定学生成绩的方法除百分制记分法外，还有一类是( )。
A．五分制记分法
B．等级制记分法
C．文字记分法
D．数字记分法
参考答案：B
Rosa knows she is the eldest of the three children in the family, and she must work hard to _______ the other two. So she does.
A．set an example to
B．make the most of
C．take a look at
D．play a trick on
净化系统运行中排烟支管由远到近风量调节开度阀应（）。
A、逐渐关小
B、逐渐开大
C、保持一个开度
