中学生物学科兴趣小组在学习了“青蛙的生殖和发育”后，开展“各种污染物对青蛙受精卵孵化率的影响”的探究活动。
他们采集了一定数量的青蛙受精卵，以化肥、洗涤剂作为污染物，在鱼缸中进行实验观察。
①他们作出的实验假设是：各种污染物会降低青蛙受精卵孵化率。
②将3个鱼缸中加入等量的清水，并编号1、2、3；在1、2号鱼缸中分别加入一定量的化肥、洗涤剂。
③把青蛙受精卵分成三等份(各100粒)，分别放人上述鱼缸中，在相同适宜的环境中孵化。
回答下列问题：
写出一个以2，﹣1为解的一元二次方程____
根据句意及首字母提示填空。
1.The handsome prince(王子) gave the White a k____ ,then she came back to life.
2.They were discussing the problems of Western s____
3.Alice married Tom last year, so Tom is her h____ .
4.His personal w____ is estimated(估计) at around $100 million.
5.I saw a c____ of students get out from the school gate.
A. Healthy way of life giving way to overuse of medicine
B. Different findings as to taking additional vitamin
C. EU’s response to overuse of health products
D. Worrying increase in multivitamin advertising
E. EU directive for the benefit of individuals
F. EU directive against prediction in novels
