地貌的形成与流水侵蚀作用有关的是()
A.长江三峡
B.戈壁和裸岩荒漠
C.河口三角洲
D.沙丘、沙垄
参考答案:A
为进一步确定诊断,建议该同学做的检查是
A.头颅超声波B.脑血管造影C.头颅CtD.脑电图E.脑脊液检查
Enough______ to stop the forest______ since the 1980’s.
A.has been done;be cut down
B.has done;cutting down
C.has been done;being cut down
D.had done;from being cut down