1.综合题- (共2题)

(1)图中操作步骤是在生产实践中常见的_____方式,属于_____生殖。
(2)①称为_____,②称为_____。①与②结合时应当使①与②的_____紧密结合,以确保①的成活。
| 父亲 | 母亲 | 儿子 |
有无酒窝 | 有酒窝 | 无酒窝 | 有酒窝 |
肤色是否正常 | 肤色正常 | 肤色正常 | 白化病 |
(1)父亲有酒窝,儿子也有酒窝,这种现象在遗传学上称为 ,有酒窝和无酒窝称为 。
(2)控制肤色正常的基因是显性基因,推测母亲的基因组成是 (用D和d表示),其产生的卵细胞含有的基因组成可能是 。
2.判断题- (共4题)
3.单选题- (共8题)
A.农药使害虫发生了抵抗农药的变异 | B.农药选择了害虫中能抵抗农药的变异 |
C.害虫会自然发生并巩固抵抗农药的变异 | D.农药的质量越来越差 |
4.选择题- (共16题)
①宪法至上的理念
②各州的权力都由联邦政府赋予
③各州完全按照自己的意志行使权力
④维护国家统一的决心
A young man went to the local expert(专家) on gems and said he wanted to become a gemologist(珠宝家). The expert turned him down because he feared the youth would not have the patience to learn. The young man asked for a chance. Finally, the expert told the youth, "Be here tomorrow."
The next morning the expert put a jade(玉) stone in the youth's hand and told him to hold it. The expert then went about his work, cutting, weighing and setting gems. The boy sat quietly and waited.
The following morning the expert again put the jade stone in the youth's hand and told him to hold it. On the third, fourth and fifth days, the expert asked the young man to do the same thing. On the sixth day, the youth held the jade stone but he could no longer stand(忍受) the silence. "Master, when am I going to learn something?" he asked. "You will learn." the expert said and went about his business.
Several more days went by and the youth almost lost his patience. But one morning as the master put the stone in the youth's hand, the young man said without looking at his hand, "This is not the same jade stone!" "You have begun to learn." said the master.
Practice makes perfect. The experience we learned from practice teaches us and develops our abilities. Experience is the best teacher. Even the most successful person had no absolute confidence once. It is experience that gives people confidence. The truth is: if you do the work and gain the experience, you'll have more confidence because you'll actually know what you're doing.
A young man went to the local expert(专家) on gems and said he wanted to become a gemologist(珠宝家). The expert turned him down because he feared the youth would not have the patience to learn. The young man asked for a chance. Finally, the expert told the youth, "Be here tomorrow."
The next morning the expert put a jade(玉) stone in the youth's hand and told him to hold it. The expert then went about his work, cutting, weighing and setting gems. The boy sat quietly and waited.
The following morning the expert again put the jade stone in the youth's hand and told him to hold it. On the third, fourth and fifth days, the expert asked the young man to do the same thing. On the sixth day, the youth held the jade stone but he could no longer stand(忍受) the silence. "Master, when am I going to learn something?" he asked. "You will learn." the expert said and went about his business.
Several more days went by and the youth almost lost his patience. But one morning as the master put the stone in the youth's hand, the young man said without looking at his hand, "This is not the same jade stone!" "You have begun to learn." said the master.
Practice makes perfect. The experience we learned from practice teaches us and develops our abilities. Experience is the best teacher. Even the most successful person had no absolute confidence once. It is experience that gives people confidence. The truth is: if you do the work and gain the experience, you'll have more confidence because you'll actually know what you're doing.
A young man went to the local expert(专家) on gems and said he wanted to become a gemologist(珠宝家). The expert turned him down because he feared the youth would not have the patience to learn. The young man asked for a chance. Finally, the expert told the youth, "Be here tomorrow."
The next morning the expert put a jade(玉) stone in the youth's hand and told him to hold it. The expert then went about his work, cutting, weighing and setting gems. The boy sat quietly and waited.
The following morning the expert again put the jade stone in the youth's hand and told him to hold it. On the third, fourth and fifth days, the expert asked the young man to do the same thing. On the sixth day, the youth held the jade stone but he could no longer stand(忍受) the silence. "Master, when am I going to learn something?" he asked. "You will learn." the expert said and went about his business.
Several more days went by and the youth almost lost his patience. But one morning as the master put the stone in the youth's hand, the young man said without looking at his hand, "This is not the same jade stone!" "You have begun to learn." said the master.
Practice makes perfect. The experience we learned from practice teaches us and develops our abilities. Experience is the best teacher. Even the most successful person had no absolute confidence once. It is experience that gives people confidence. The truth is: if you do the work and gain the experience, you'll have more confidence because you'll actually know what you're doing.
5.填空题- (共3题)
组别 | A | B | C |
蚕卵数 | 1000 | 1000 | 800 |
培养温度 | 16 ℃ | 20 ℃ | 30 ℃ |
培养湿度 | 75% | 75% | 75% |
孵化出蚕蚁所需时间 | 10 | 9 | 8 |
孵化率 | 90% | 98% | 68% |
取滞留到第二年春天的呈紫黑色(这种颜色的卵是已经受精的卵)的蚕卵放到多功能培养箱中进行培养,实验结果如右表。请回答:
(1)提出的假设是:
(2)这个实验的方案存在什么问题?请指出并加纠正 。
(3)从实验结果来看,最适宜蚕卵孵化的温度是 ℃
(4)这个实验的变量是
(5)实验结论是 。
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【1】题量占比
综合题:(2道)
判断题:(4道)
单选题:(8道)
选择题:(16道)
填空题:(3道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:2
5星难题:0
6星难题:8
7星难题:0
8星难题:6
9星难题:1