飞机加油车压力控制系统能保证加油胶管末端正常加油压力()。
A.不小于0.35MPa
B.不超过0.35MPa
C.不小于0.42MPa
D.不超过0.42MPa
参考答案:B
We haven't seen each other for 20 years, but I recognized him _____ I saw him.
Which of the following is wrong ?
A.immediately
B.the moment
C.as soon as
D.while
经济增长是指______的增加。