鼻咽癌的好发部位是()。
A.鼻咽顶壁
B.咽隐窝
C.咽鼓管圆枕
D.梨骨后缘
E.上述都不是
参考答案:B
We found ourselves ____ more and more eagerly to the coming sports meeting.
A.looking back
B.looking forward
C.looking up
D.looking down
登高作业要做好哪些安全事项?