群落演替的早期阶段是非常重要的,而在后期则无关紧要的是生物的______能力。
参考答案:散布
Philip likes to play football. He often plays football after school with his friends. Sandy likes to play basketball. She teaches her friends how to play it every Sunday afternoon. Han Mei is very good at the computer. She always uses it to draw pictures three times a week, and she uses it to surf the Internet. She has a good friend in America. Her name is Mary. Lin Tao is also good at drawing pictures. But he never uses computer to draw.
小题1:What do Sandy and his friends do on Sunday afternoon?
A.Play football
B.Play basketball
C.Draw pictures
D.Play computer games小题2:How often does Han Mei draw with computer?
A.Once a week
B.Three times a week.
C.Once a day
D.Every day小题3:Who likes to surf the Internet?
A.Philip
B.Sandy
C.Han Mei
D.LinTao小题4:How often does Lin Tao use computer to draw?
A.Never
B.Hardly ever
C.Three times a week
D.Every week小题5:Who's Mary?
A.She's an English girl.
B.She's Sandy's friend.
C.She's Han Mei's friend.
D.She's Lin Tao's classmate.
下列关于药物经皮吸收制剂的叙述错误的是()
A.经皮吸收制剂不能避免肝首关效应
B.表面活性剂、二甲亚砜、氮酮等都是较常用的经皮吸收促进剂
C.经皮给药系统的工艺主要分为涂膜复合工艺、充填热合工艺和骨架粘合工艺
D.经皮吸收制剂既能起局部治疗作用,也能起全身治疗作用
E.黏着性能是经皮给药制剂的重要性质之一