题目

（1分）要将如图所示显微镜下的视野“甲”变为视野“乙”，下列正确的是（ ）A．换用高倍物镜，再向右上方移动装片B．换用高倍物镜，再向左上方移动装片C．向右上方移动装片，再换用高倍物镜D．向左下方移动装片，再换用高倍物镜 答案：考点：显微镜的基本构造和使用方法． 分析：本题考查的是视野中物像的特点，在视野中的物像是实物的倒像；及显微镜的放大倍数发生变化时，在显微镜下看到的细胞体积、数目以及视野亮度的变化． 解答：解：由于在显微镜下观察到的物像是实物的上下左右颠倒的倒像．所以我们移动玻片标本时阅读表达。      Sally was fourteen. She studied in a middle school. She liked dancing and singing and spent a lot oftime on them. But she hated math and even decided to give it up.Her father was anxious (焦虑) about it.      It was Sunday. ①Sally's father called to his sister who taught math in another school. He hoped she would come and tell his daughter how to learn math.The woman came and said, "You are a clever girl, Sally. I'm sure you will soon learn math well if you do your best."      "I'm afraid I can't, Aunt," said Sally. ②"Girls can't be good at math."      "I don't think so," said the woman. "I was good at it when I was a girl. You must do more exercisesand try different ways to practice ③ ______ (do) math problems until you work them out or at least understand them better. Here is a math problem. ④Please think it over and see if you can work it out."      "OK." said the girl. "Let me try."      About an hour later Sally took the exercise book to her aunt and said, "I've tried several times andworked out the problem at last!"      "Well done!" her aunt looked at her answer and said happily, "Now you see, math is not as difficult as you thought." 1. 将划线②部分改为同义句     Girl can't                                     math. 2. How old was Sally?                                                                        3. 将划线①部分译为汉语                                                                       4. 用所给词的适当形式填在③处的横线上                                                                       5. 将划线④部分译成汉语