一、填空：
2、在加热的过程中，蜡烛发生了什么变化？（p29）
3、你知道哪些化学变化的事例呢？举出几个例子。
4、填埋场在填满垃圾以后，可以在上面修建公园、体育场、但是不能用来建筑房屋和种植庄稼。
答：这个垃圾场不仅要能填埋垃圾，而且要能防止周围环境和地下水的污染。
14、在显微镜下观察物体有一定的要求。物体必须制成玻片标本，才能在显微镜下观察它的精细结构。
13、以太阳为中心，包括围绕它转动的八大行星（包括围绕行星转动的卫星）、矮行星、小天体（包括小行星、流星、彗星等）组成的天体系统叫做太阳系。
2、昆虫种类繁多，分布很广，它们有着和其他动物不同的身体构造和本领。
5、月球在圆缺变化过程**现的各种形状叫作月相。月相变化是由于月球公转而发生的。它其实是人们从地球上看到的月球被太阳照亮的部分。
9、月球地貌的最大特征，就是分布着许多大大小小的环形山，环形山大多是圆形的。关于环形山的形成，目前公认的观点是“撞击说”。 小学三年级下册英语重点知识总结。
1. what is thatit is my family tree.
2. what are they? they are cars.
3. who is the old lady with grey hair? she is my grandmother.
who is that boy with a ballhe is my brother.
4. who are the childrenthey are my cousins.
5. what about that beautiful woman? she is my mother.
what about that one on the shelf? it is a picture of my family.
6. do you h**e any pigsyes, i do. /no, i don’t.
7. i h**e a farm. (肯定) -i don’t h**e a farm. (否定)
i h**e some ducks. (肯定) -i don’t h**e any ducks. (否定)
8. what is it？ it is a car.
what is this? it is a stamp.
what is that? it is a postcard.
9. what are they? they are cars.
what are these? they are stamps.
what are those? they are postcards.
10. 句型：[,
where are you from? i am from china. (注：国家类与国籍类单词第一个字母要大写)
where is she from? she is from japan.
we are both from britain. 我们都是来自英国。
11. 问： what is in your …?what is your … like?
答： it has…
如： -what is in your bedroom? /what is your bedroom like?
---it has a bed and a chair. /
12. where is the mouse? it is in the corner.
13. where are those mice? they are under the bed.
14. -how many ducks are there in the picture? [
---there are three.
---how many ducks are there in the picture? [
--there is one.
-- are there any ducks in the picture? [
---yes, there are.
---are there any ducks in this picture? [
-- yes, there are. /或者： yes, there is one.
15．what is init has… /there is (are)…
---what is in your bedroom? -it has a bed and a desk.
或者 --there is a bed and a desk.
---what is in your classroom? -it has some desks and chairs.
或者 --there are some desks and chairs.
补充知识点：
linda is their daughter.(肯定句) -linda isn’t their daughter.（否定句）
they are my teachers.( 肯定句) -they aren’t my teachers.( 否定句)
the + 姓 + s --表示…一家人（本身以“s”结尾的只加 ’）
如： the webb’s (伟博一家人) the jones’ (琼思一家人)
h**e & has
iheyoushe
wet': span', c': h**e', r': r_3itt': span', c': has', r': r_3'}]
they单数形式。
复数形式。 some & any
1) 相同点：都表示“一些”的意思。
2) 不同点：some 一般用于肯定句；any一般用于否定句（not；n’t）和疑问句（？）
例句： i h**e some pigs.
i don’t h**e any pigs.
do you h**e any pigs?
有关国家类与国籍类单词总结：
国家 america / australia / canada / china / japan / britain / france / germany
国籍 american / australian / canadian / chinese/ japanese/ british/ french/ german
注意：（美国缩写形式是：the usa ; 中国的缩写形式是：the prc ; 英国的缩写形式是： the uk .
常用的方位介词有如下：
on 在。。。上面
in 在。。。里面
under 在。。。下面
in front of 在。。。前面
behind 在。。。后面
beside( by; next to) 在。。。旁边
against 挨着、靠着。。。
near在。。。附近
opposite在。。。对面
between… and 在。。。和。。。的中间。
小学三年级下册英语重点知识总结
1.what is thatit is my family tree.2.what are they?they are cars.3.who is the old lady with grey hair?she is my grandmother.who is that boy with a bal...
小学三年级下册英语重点知识总结
1.what is thatit is my family tree.2.what are they?they are cars.3.who is the old lady with grey hair?she is my grandmother.who is that boy with a bal...
小学三年级英语重点知识
小学英语三年级 pep 重点句型归纳 hello hi 你好！goodbye bye see you 再见！what is your name?你叫什么名字i m lily.我叫莉莉。h e a pen pencil pencil case ruler eraser crayon book bag ...