俗话说的“油葫芦”是指（）。
A、减速器
B、电机
C、液力偶合器
D、加油壶
参考答案：C
We must be strict ______ ourselves and ______ our work. [ ]
A. with, in
B. in, with
C. with, with
D. in, in
POP-Q分类法
