题目内容
【题目】根据句意及图片或首字母提示完成单词。
(1)The students are cleaning (打扫) the(教室)now.
(2)What can you see on the(黑板)?
(3)There are some(鸟)in the tree.
(4)How many(铅笔)are there?
(5)—What's that in English?
—Sorry, I don't k
【答案】
(1)classroom
(2)blackboard
(3)birds
(4)pencils
(5)know
【解析】(1)考查名词。句意:这些学生们现在正在打扫教室。classroom”教室“,名词,前面用定冠词修饰,表示特指教室。故填classroom。
(2)考查名词。句意:在黑板上你能看到什么?blackboard”黑板“,名词。on the blackboard”在黑板上“,是一个介词短语。故填blackboard。
(3)考查名词。句意:在树上有一些鸟。bird”鸟“,名词。空前的some是一些的意思,而且句中There are表示复数的形式,故这里应用名词的复数,故填birds。
(4)考查名词。句意:那里有多少支铅笔。pencil”铅笔“,名词。句中How many 是提问数量的一个疑问词,后面跟名词的复数形式,故这里应填pencils。
(5)考查动词。句意:—那个用英语怎么说?—对不起,我不知道。know”知道“,动词。I don't know.”我不知道“。这里应用动词原形。故填know。
【题目】
Below is a description of a single scientific experiment. It shows us how iron reacts (反应) with air and with water. Aim: To find out if iron rusts(生锈) (a) in dry air; (b) in water that has no air in it (air-free water) ; (c) in ordinary water. Materials: Some clean iron nails (铁钉) ; test tubes(试管); test tube holder; cotton wool; oil; Bunsen burner. | |
Iron in dry air Method (1) Put some iron nails at the bottom of a test tube. (2) Push some cotton wool down the tube. (3) Leave the tube for one week. Result After one week, the nails have not rusted. Conclusion Iron does not rust in dry air. | (4) Add some oil to the water. (This will keep air out of the water.) (5) Leave the tube for one week. Result The nails do not rust in the tube with air-free water. Conculsion Iron does not rust in air-free water. |
Iron in ordinary water Method (1) Half –fill a test tube with water and add two or three clean nails. (2) Leave the tube for one week. Result The nails rust in the tube with ordinary water. Conclusion Iron rusts in ordinary water. (238 words) | |
Iron in air-free water Method (1) Half-fill a test tube with water. (2) Boil the water for three minutes. (This makes surethere is no air in the water.) (3) Put two or three clean nails in the water. | |
【1】In the first part of the experiment the cotton wool is most probably used to ____.
A. keep the air dry B. keep the tube wet
C. make the nails rust D. keep the tube clean
【2】What are necessary steps to make sure the water in the tube is air-free?
① Leave half a tube of water in it.
② Boil the water for some time.
③ Put some clean iron nails in the tube.
④ Add some oil to the water.
A. ①② B. ①③ C. ②③ D. ②④
【3】We can conclude from the experiment that only ____ makes iron rusty.
A. dry air B. cotton wool
C. ordinary water D. air-free water
【题目】用方框中所给单词的适当形式填空,每词仅用一次,每空一词。
decide different little through healthy |
(1)They to go on vacation yesterday evening.
(2)There are a few between the two pictures. Can you tell them?
(3)My father plays chess at once a week.
(4)The best way to relax is exercise.
(5)You should look after your.