描述肢体远、近端的人体参考部位是
A.膈肌
B.心脏
C.腹部
D.颈部
E.体表
参考答案:B
解析:描述肢体远、近端的人体参考部位是心脏。
--- Will you please fly a kite with me in the park this afternoon?
---_____. I will look after my sister.
A.I think so .
B.I’d like to.
C.I’m afraid so.
D.I’m afraid not .
嫁接繁殖的特点有那些?