人类的生殖过程中，在输卵管中形成的细胞是（　　）

一个多项式因式分解后是 $3x(x+1)$ ，那么这个多项式是（　　）

小明的思路是:如图2,过P作PE∥AB,通过平行线性质,可得∠B,∠P,∠D之间满足____关系。(直接写出结论)

问题情境2

如图3,AB∥CD,P是AB,CD内部一点,P在BD的左侧,可得∠B,∠P,∠D之间满足____关系。(直接写出结论)

问题迁移:请合理的利用上面的结论解决以下问题:

已知AB∥CD,∠ABE与∠CDE两个角的角平分线相交于点F 

    Tu Youyou is a Chinese pharmaceutical chemist(药学家) and educator. She is best known for discovering artemisinin(青蒿素) which ____(use) to treat malaria(疟疾) and has saved ____(million) of lives. She won the Nobel Prize in Medicine in October 2015. She is the ____(one) Chinese woman to win this prize.

    Tu was born in Ningbo, Zhejiang Province, China ____ December 30^th, 1930. From 1951 to 1955, she attended Peking University Medical School. Later, Tu was trained for two and a half ____(year) in traditional Chinese medicine. Now she is the Chief Scientist in the Academy(研究院) of Chinese Medicine in Beijing.

    Tu has some health problems as a result of working poor conditions for ____long time. But she is still doing research. When Tu finally received Nobel Prize for her achievements, she said the success ____(belong) to her team, which did research in those poor conditions. And she thinks artemisinin is a gift from China and from ____(tradition) Chinese medicine to the world, to the millions and millions of people,____ (especial) poor children, all over the world who have malaria.

    Tu Youyou is already 87 years old,____she says she won't stop studying or working.