--I think it's really necessary. It is reported that the food that Chinese people
every year is enough to feed 200 million people for a year.
A:eat
B:have
C:waste
D:make
对人来说,子代的性别主要决定于亲代的( )
在现实生活中,我们也常会遇到一些封建迷信思想作怪的现象,我们应该用怎样的态度去面对?
下图中能正确表示地球自转方向的是 ( )
(Ⅰ)求道路BE的长度;
(Ⅱ)求道路AB,AE长度之和的最大值.