单项选择题
May I set off the shortage（）the overage?
A.against B.by C.to D.with
单项选择题 Movement of liquid in a tank when a vessel inclines causes an increase in（）.
单项选择题 Neglecting friction, you desire to life a 300 kgs weight with a stress on the hauling part of 100kgs.Which of the following tackles would you use ?（）.
单项选择题 Never（）stowed like this.
