纯系
参考答案:
纯系:通过单株选择或连续自交产生的后代,在表现型和基因型上都表现相对一致。
—What were you doing when you heard Malaysian airlines flight lost?
—I my homework.
A.were doing.
B.am doing.
C.was doing.
D.is doing.
肾动态显像基本原理是什么?包括哪些检查?