完成下列有关“观察人口腔上皮细胞实验”的填空。（9分）（1）_爱下问搜题

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问题实验题

完成下列有关“观察人口腔上皮细胞实验”的填空。（9分）

（1）用滴管在载玻片中央滴一滴。

（2）用凉开水把口漱干净。用牙签从口腔腮壁处轻刮几下。

（3）把刮下的东西放在的中涂几下。

（4）盖上，注意不要留下。

（5）把制成的口腔上皮细胞装片用染色。然后放在显微镜下观察。

（6）口腔上皮细胞的形状是圆形的，由、、构成。

答案

2.（1）生理盐水（3）载玻片生理盐水（4）盖玻片气泡（5）碘液（6）细胞膜、细胞质、细胞核

题目分析：口腔上皮临时装片的制作过程如下：（1）用滴管在载玻片的中央滴一滴生理盐水（为了维持细胞的正常形态）；（2）用凉开水漱口（以除去口腔内的食物残渣）．用消毒牙签在口轻侧壁刮几下；（3）把附着了口腔侧壁碎屑的牙签在生理盐水中轻轻涂抹（使口腔上皮细胞均匀散开）；（4）用镊子夹起盖玻片，使它的一侧先接触载玻片上的液滴，然后缓缓放平（避免产生气泡）；（5）在盖玻片的一侧滴加碘液，用吸水纸从盖玻片的另一侧吸引．（6）通过观察可知：口腔上皮细胞的形状是圆形的，由细胞膜、细胞质、细胞核构成．故答案为：（1）生理盐水（3）载玻片生理盐水（4）盖玻片气泡（5）碘液（6）细胞膜；细胞质；细胞核

完形填空

I found out one time that doing a favor for someone could get you into a lot of trouble. I was 36  the eighth grade at the time, and we were having a final   37 . During the test，the girl 38  next to me whispered something，but I didn’t understand. So I leaned(倾斜) over her way and found out that she was trying to ask me 39 I had an extra pen. She showed me that 40 was out of ink and would not write．I happened to have an extra one，so I took it out of my pocket and put it on her desk．
Later, after the test papers had been 41 the teacher asked me to 42 in the room when all the other students 43  . As soon as we were alone, she began to talk to me about 44 it meant to grow up；she mentioned how important it was to stand 45  your own two feet and be responsible for your own acts. For a long time, she talked about __46 _and emphasized the fact   that when people do something dishonest，they really 47 themselves．She made me promise that I would think 48  about all the things she had said. Then she told me I could   49 . I walked out of the room wondering   40  she had chosen to talk to me about all those things．
Later on，I found out that she thought I had cheated on the test. When she saw me lean over to talk to the gir1 next to me, it looked  51 I was copying answers 52  the girl’s test paper. So I came to find her and tried to explain about the pen, but all she could say was it seemed very strange to her that I hadn’t   53  anything about the pen the day she talked to me right after the test. 54  I tried to explain that I was just doing the girl a favor   55  letting her use my pen, I was sure she continued to believe that I had cheated on the test．

B．were studying

D．were dismissed

D．reliability

A．Long before

D．Even though

单项选择题

利用抗原抗体反应的可逆性原理设计的免疫学技术是

A．酶免疫技术
B．放射免疫技术
C．金免疫技术
D．荧光免疫技术
E．亲合层析技术