采用基因工程技术将人凝血因子基因导入山羊受精卵，培育出了转基因羊。但是，人凝血因子只存在于该转基因羊的乳汁中。以下有关叙述，正确的是

Lots of university students practice _______ English _______.

随着资源的开发和现代化工业的发展，你认为减少酸雨以保护环境可采取的措施是（　　）

①尽量少用煤作燃料　②把工厂的烟囱加高　③将燃料脱硫后才燃烧　④开发新的清洁能源　⑤植树造林　⑥在已酸化的土壤中加石灰．

给下列问答句配对

① What do you need?____                   a. I like the red dress.

② Drink some water, Mum. ____          b. Thank you.

③ What do you like? ____                     c. I need a red dress.

④ Smell the orange.  ____                     d. It's windy.

⑤ How is the weather?  ____                 e. It's nice.