⑴Would you like some dumplings? ____  A. He is playing with his toy car.

⑵Who is drawing?____                   B. Yes, please.

⑶What is Joe doing?____                 C. I see some beautiful birds.

⑷What do you see?____                  D. I would like a cup of tea.

⑸What would you like to drink?____       E. My sister is drawing.

中国古代“秀才不出门,便知天下事”的说法在今天能够实现,主要表现在　(　　)

①人们可以在网上浏览新闻

②可以通过网络进行购物、上课、看病

③电子邮件可以把信件在几秒钟之内传到千里之外

④能在屏幕上作长时间的通话

护士给病人进行静脉注射前，先用手从上臂内侧向静脉远心端推压，随即用乳胶管扎紧上臂，结扎乳胶管的下方静脉就会膨大，显出结状突起．这证明了静脉（    ）

有一种望远镜是由两组____ 镜组成的．靠近眼睛的叫做目镜，靠近被测物体的叫做物镜．目镜的作用相当于一个____ 镜．