使用递归函数计算n!（n=0，1，2，，3，....）的是（）
A.
B.
C.
D.
参考答案：B
When an economy dips into a recession, automatic stabilizers will tend to alter government spending and taxation so as to:（）
A. reduce the budget deficit (or increase the surplus).
B. enlarge the budget deficit (or reduce the surplus).
C. ensure that the budget will remain in balance.
What is the primary purpose of a splint applied in first aid?（）
A.Control bleeding
B.Reduce pain
C.Immobilize a fracture
D.Reset the bone
