我国水产品总产量哪年跃居世界第一位()
A.1990
B.1991
C.1992
D.1993
参考答案:A
如图所示是某地等高线地形图(海拔:米).沿线可能有河流且流速较快的是( )
A.虚线甲处
B.虚线乙处
C.虚线丙处
D.虚线丁处
When did you plan _____ to Singapore _____ last Sunday. [ ]
A. to fly, on
B. to fly, /
C. flying, in
D. flew, at