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【简答题】
I passed all the other courses that I took at my university, but I could have never passed botany. This was because all botany students had to spend several hours a week in a laboratory looking through a microscope at plant cells, and I could never once see a cell through a microscope. This used to make my professor angry. He would wander around the laboratory pleased with the progress all the students were making in drawing the structure of flower cells, until he came to me. I would just be standing there. “I can’t see anything,”I would say. He would begin patiently enough, explaining how anybody can see through a microscope, but he would always end up angrily, claiming that I could too see through a microscope but just pretended that I couldn’t. “It takes away from the beauty of flowers anyway.”I used to tell him.“We are not concerned with beauty in this course,”he would say.“We are concerned with the structure of flowers.” “Well,” I’d say.“I can’t see anything.” “Try it just once again,” he’d say, and I would put my eye to the microscope and see nothing at all, except now and again something unclear and milky. “You were supposed to see a clear, moving plant cells shaped like clocks.” “I see what looks like a lot of milk.” I would tell him. This, he claimed, was the result of my not having adjusted the microscope properly, so he would readjust it for me, or rather, for himself. And I would look again and see milk. I failed to pass botany that year, and had to wait a year and try again, or I couldn’t graduate. The next term the same professor was eager to explain cell-structure again to his classes. “Well,”he said to me, happily, “we’re going to see cells this time, aren’t we?” “Yes,sir,” I said. Students to the right of me and to the left of me and in front of me were seeing cells; what’s more, they were . Of course, I didn’t see anything. So the professor and I tried with every adjustment of the microscope known to man. With only once did I see anything but blackness or the familiar milk, and that time I saw, to my pleasure and amazement, something like stars. These I hurriedly drew. The professor, noting my activity, came to me, a smile on his lips and his eyebrows high in hope. He looked at my cell drawing. “What’s that?”he asked.“That’s what I saw,”I said.“You didn’t, you didn’t, you didn’t!”he screamed, losing control of himself immediately, and he bent over and looked into the microscope. He raised his head suddenly. “That’s your eye!”he shouted.“You’ve adjusted the microscope so that it reflects!You’re drawn your eye!” 小题1:Why couldn’t the writer see the flower cells through the microscope? . A.Because he had poor eyesight B.Because the microscope didn’t work properly C.Because he was not able to adjust the microscope properly D.Because he was just playing jokes on his professor by pretending not to have seen it 小题2:What does the writer mean by “his eyebrows high in hope”in the last paragraph? A.His professor expected him to have seen the cells and drawn the picture of them B.His professor hoped he could perform his task with attention C.His professor wished him to learn how to draw pictures D.His professor looked forward to seeing all his students finish their drawings 小题3:What is the thing like stars that the writer saw in the last paragraph? A.Real stars B.His own eye C.Something unknown D.Milk 小题4:In what writing style did the writer write the passage? A.Realistic B.Romantic C.Serious D.Humorous
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参考答案:
举一反三
【单选题】下列关于混凝土垫层的说法,正确的是( )。
A.
厚度一般为60~100mm。混凝土强度等级不宜低于C15
B.
粗骨料粒径不应超过50mm,并不得超过垫层厚度的1/3
C.
浇筑混凝土垫层前,基层应洒水湿润
D.
浇筑大面积混凝土垫层时,宜采用分仓浇筑的方法,分仓距离一般为5~6m
【单选题】下列有关室内地面垫层构造中,哪条不合要求?
A.
灰土垫层应铺设在不受地下水浸湿的基土上,其厚度一般不小于lOOmm
B.
炉渣垫层粒径不大于40mm,必须在使用前一天饶水闷透
C.
碎(卵)石垫层厚度一般不宜小于100mm,粒径不大于垫层厚度的2/3
D.
混凝土垫层厚度不小于80mm,强度等级不低于C15
【单选题】基因工程技术不包括:
A.
酶工程
B.
基因工程抗体
C.
自杀基因治疗技术
D.
蛋白质工程
E.
微生物工程
【多选题】基因工程抗体包括
A.
胎盘丙种球蛋白
B.
双价抗体
C.
完全人源化抗体
D.
抗毒素
E.
嵌合抗体
【单选题】基因工程抗体是
A.
基于DNA重组技术制备抗体
B.
利用蛋白工程技术制备抗体
C.
对目的基因处理后导入受体细胞表达的抗体
D.
人工制备的抗体
E.
以上均是
【单选题】垫层的混凝土强度等级不宜低于_____
A.
C10
B.
C15
C.
C20
D.
C25
【单选题】基因工程抗体是
A.
应用DNA重组技术制备抗体
B.
利用蛋白工程技术制备抗体
C.
人工制备的抗体
D.
对目的基因处理后倒入受体细胞表达的抗体
E.
以上均是
【简答题】基因工程抗体[3分]
【单选题】以下不是基因工程抗体的是
A.
基于DNA重组技术制备抗体
B.
利用蛋白质工程技术制备抗体
C.
人工制备抗体
D.
对目的基因处理后导入受体细胞表达的抗体
E.
基于细胞融合技术制备抗体
【单选题】基因工程抗体是
A.
基于DNA重组技术制备抗体
B.
利用蛋白质工程技术制备抗体
C.
对目的基因处理后导入受体细胞表达的抗体
D.
人工制备的抗体
E.
以上均是
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