国际金融市场上的长期信贷通常是指贷款期限在()的贷款。
A.5年以上
B.4年以上
C.3年以上
D.2年以上
参考答案:A
— Does your uncle still smoke?
— He given it up. It's two years ever since he _____. [ ]
A. can't have; smoked;
B. may have; smoked
C. should have; has smoked
D. should have; didn't smoke
图中( )比例—积分(PI)调节器的过渡过程特性曲线,如有请指出是( )。
A.有,图d
B.有,图b
C.没有
D.有,图a