有关样方选取的叙述,正确的是( )
A:对乔木的调查取样与双子叶草本植物的调查取样完全相同
B:调查双子叶草本植物的种群,样方的大小不一定为1 m2
C:取样的关键是在同一样方内随机取样
D:调查双子叶草本植物的种群,样方数目是固定的
听独白,完成信息记录表。
How far is the school from Peter's home?
It's about kilometers.
How does Peter go to school?
He goes .
How many students are there?
There are students.
Where is the park?
It's the school.
What does Peter do in the park?
He plays with his friends.
如图为女性生殖系统的部分结构示意图,下列说法不正确的是( )