2020年六年级生物下册 第三单元 第二章 第三节 开花和结果评测练习 鲁科版（五四制）

2020年六年级生物下册 第三单元 第二章 第三节 开花和结果评测练习 鲁科版（五四制）一、 选择题1. 胚珠着生在（ ）。A. 花瓣中 B.雄蕊中 C.柱头中 D.子房中2. 桃花中能产生花粉的结构是（ ）。A. 花药B.花丝 C.柱头 D.子房3. 花粉在萌发过程中产生花粉管，当花粉管进入（ ）时释放出精子。A.柱头 B.花柱 C.子房 D.胚珠4. 精子与卵细胞结合形成受精卵的过程叫（ ）A.开花 B.传粉 C.受精 D.结果5.小麦花的主要部分是（ ）A.雌蕊和雄蕊B.花托和花柄C.花瓣和花萼D.果实和种子6.玉米开花时如果遇上连阴雨的天气，产量就会降低，下面解释正确的是（ ）。A.风大、气温低，花粉不能成熟 B.花粉被雨水冲落，影响风力传粉C.风大、气温低，影响昆虫传粉D.阴雨天子房不能发育7.下图是桃花结构图，请回答下列问题：（1）图中（ ）构成雄蕊，花粉中（ ）中。（2）图中（ ）构成雌蕊。 答案：1.D 2.A 3.D 4.B 5 .A 6.B 7.(1)2、3 2 (2)1、4、5附送：2020年六年级英语上册Unit1Igotoschoolat800Lesson1教案人教精通版2 How to express using their daily life.Teaching aids word cards and multi-mediaTeaching stepsStep 1. Warming-up and Revision1. T: Look , what time is it? Ss try to answer. Use the real clock to learn how to read the time. (1) 直接读数。 E.g 整点:8:00 - eight. 几点过：9:16 - nine sixteen.(2)过几分用past。（1-30分） 9:16 - sixteen past nine. 半点： 9：:30.half past nine(3) 差几分几点用to。（31-59分） 10:52eight to eleven. say the time. 9:30, 7:00, 11:45， 3:30, 6:30Step 2. PresentationLearn the words： in the morning = am get up 6:00go to school 7:00have breakfast 7:30 have classes 8:10 have lunch 12:20in the afternoon = pm have classes again 1:30school is over. 4:10go home 5:00 have dinner 6:15watch TV after dinner go to bed 10:002. T: This is my daily life, how about your daily life?(老师在讲授自己的日常生活的时候随时问学生，以达到边学边练习的目的) The Ss talk about their whole daily life.(the teacher will give them about 5minutes to practice)3. 学习e-mail 的格式。T: today I got an e-mail from Miss Song. Look.Read the e-mail together, then answer the questions:(1)Where isMiss Song from?(2)When does she go to work?(3)When does she do some listening?Step 3 Practice1. Listen to the tape, feel the Chinese.2. Listen and repeat , pay attention to the pronunciation.3. Read by themselves, find out what you cant understand.(每一遍都给学生的任务，让学生带着问题去听或是读课文)4. Teach : about 大约，关于。By e-mail 通过邮件，make a sentence.（造句练习加深对词义认识，提高单词的使用能力）5. Do some exercises:(1)Let me tell you _ his family.A. in B. of C. about D. for(2)Please get up _ 6:00 in the morning.A. at B. in C. for D. about(3)I have lunch at _ .A. 7:00 B. 11:50 C. 19:15 D. 23:10(4)Class _ over at 4:00.A. is B. begins C. are D. haveStep 4 summary What do you learn?Step 5 Homework1. Read the e-mail 10 times.2. Try to write an e-mail for your classmate.3. Preview next lesson.