甲醇对人体有很大的毒害作用,尤其是对人的()危害最大,所以必须严格控制白酒中的甲醇含量。
参考答案:视神经
The doctor told Mom to eat vegetables and meat because she was getting fatter and fatter.
A.much; little
B.more; less
C.many; few
D.more; fewer
浆向后划水,艇就向前运动,这一现象中包含的物理知识有(只要写出两点):
1) ,
2) 。