题目

在显微镜观察洋葱表皮细胞的实验中，下列说法正确的是（ ） A . 制作临时装片时要在载玻片的中央滴一滴生理盐水 B . 盖盖玻片时，先使它的一边接触载玻片上的液滴，然后缓缓地盖上 C . 观察装片的时候，发现物象在视野的左上方，若要将物像移到视野的中央，应将装片向右下方移动 D . 物像的放大倍数是目镜和物镜放大倍数之和下面短文中有10处语法错误。请在有错误的地方增加、删除或修改某个单词。增加：在缺词处加一个漏字符号（∧）,并在其下面写上该加的词。删除：把多余的词用斜线（\）划掉。修改：在错的词下划一横线，并在该词下面写上修改后的词。注意：1. 每处错误及其修改均仅限一词；2. 只允许修改10处，多者（从11处起）不计分。David, a little boy living next door by me, liked fast food very much. His parents was so busy that they had a little time to cook for him at home. So they often took him out eat fast food. That was because David became overweight. My mother had always told his parents that too much fast food was harmful, and they ignored my mother’s suggestion. Recently, the doctor warned him never to eat fast food any more after the poor boy has a physical examination. His parents came to realize what terrible a mistake we had made. Now David’s mother often comes to ask my mother for some advices on how to make healthy food.