高二生物 周末巩固练习(五)1. 一男子把X染色体传给他的孙女的概率是( )A.B. C.0 D.2.对XXY综合症个体的染色体检查显示他的两条X染色体分别来自外祖父和外祖母说明多出的性染色体来源于 A.卵细胞形成过程中的减数第一次分裂不分离 B.卵细胞形成过程中的减数第二次分裂不分离 C.精子形成过程中的减数第一次分裂不分离 D.精子形成过程中的减数第
08届高三生物二轮巩固练习52选修1(2) 编写 周杰 审核 冯小勇 班级____________ ___________一.单项选择题:的粗提取过程中有下列步骤: ⑴过滤用蒸馏水稀释过的鸡血细胞液 ⑵过滤含粘稠物的溶液 ⑶过滤溶解有DNA
高二英语必修5单词和词汇巩固练习Unit 1 Great scientists一单词拼写(须用本单元的单词和词汇)1. This new e _______________for the car works well.2. She has a strong c_________________.3. The farmers in this area had a good harvest l
生物练习题1.在噬菌体侵染细菌实验中细菌体内的DNA和蛋白质分别分含有31P和32S噬菌体中的DNA和蛋白质分别含有32P和35S噬菌体DNA在细菌体内复制了三次子代噬菌体中含有32P的噬菌体和含有35S的噬菌体分别占子代噬菌体总数的A.14和1 B.34和0 C.14和0 D.34和12.正常人体内发生碱基互补配对关系的过程是①DNA的复制 ②转录 ③逆
英语必修二Unit4 Wildlife protection基础词汇巩固练习 ------ by Vicky. : PAGE 1高一英语必修二unit4知识点decrease toby...减少到了 on the decrease 在减少中 decrease------increase(增加)die out 灭绝 die forto do 渴
8A Unit3 巩固练习一词汇运用:(25分) A)根据首字母填空. 1. Tom always gets up early so I w why he is late for school today. 2. The Eiffel Tower is made of m___ ___. 3. The c___ ___ of the meeting is about 1
Ⅰ.单词拼写1.Not having seen him for a long timeI can hardly ________ (认出)him.答案:recognize2.They went________(直接)home without stopping at the gas stationfor it was too late.答案:straight3.The result of th
必修5 Unit 3 Life in the future 同步巩固练习单词拼写(10分)I have to remind myself ____________(不断地)that I am really in AD seems you keep getting flashbacks from your___________(早先的在前的) time first my new ___
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《二次根式》全章复习与巩固--巩固练习(提高)一、选择题 1.是怎样的实数时,在实数范围内有意义?()AB CD 2.(2016?杨浦区三模)如果,那么 () A. B. C. D. 3.已知,那么满足上述条件的整数的个数是()A.4 B 5C6 D74.若x<0,则的结果是() A.0 B.-2 C.0或-2 D.2 5.的值是() A.-
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