短文改错﹙10分﹚

Though great progress have been made in science these years, there are still many people live in poor conditions. They make their lives by collecting or selling used things. Their children cannot go to school because they had not enough money to send their children there. How do you think so many people still suffer from poverty now? The answer lies on the population explosion﹙人口大爆炸﹚. A president of a developing country once said, “It is us who are to blame for the poverty because we used to ‘produce’ child without limit.” Although this few words sound simple enough, they have clear pointed out one of the causes of the population explosion.

血涂片制备时（）

A.血滴愈大、角度愈大、推片速度愈快，血膜愈厚

B.血滴愈小、角度愈小、推片速度愈慢，血膜愈薄

C.血滴愈小、角度愈小、推片速度愈慢，血膜愈厚

D.血细胞比容增高、血液粘度较高时，应采用小血滴，小角度，慢推

E.血细胞比容减低、血液较稀时，应采用大血滴，大角度，快推