急流滩是山区河流最典型的河段形式,一般出现在()等突出物附近。①山脚②碛坝③岸嘴④河心障碍物⑤河床凸起物
A.①②③
B.①②③④
C.①②③④⑤
D.①③⑤
参考答案:C
“檀渊之盟”是__________和_____________的和议? [ ]
A、宋、金
B、宋、西夏
C、宋、辽
D、西夏、辽
The family _____ at the lunch table when someone came to tell them what had happened
at _____. [ ]
A. were sitting; Mr Brown
B. were sitting; Mr Brown's
C. was sitting; Mr Brown
D. was sitting; Mr Brown's