试题与答案

小红同学在做“探究平面镜成像”的实验时,将一块玻璃板竖直架在水平台上,再取两段完

题型:实验题

题目:

小红同学在做“探究平面镜成像”的实验时,将一块玻璃板竖直架在水平台上,再取两段完全相同的蜡烛A和B,点燃玻璃板前的蜡烛A,进行观察,在此实验中:

(1)小红选择玻璃板代替镜子进行实验的目的是__________.

(2)所用刻度尺的作用是便于比较像与物________关系.

(3)选取两段完全相同的蜡烛是为了比较像与物的__________关系.

(4)移去后面的蜡烛B,并在其所在位置上放一光屏,则光屏上__________接收到蜡烛烛焰的像(填“能”或“不能”).所以平面镜所成的像是__________像(填“虚”或“实”).

(5)小红将蜡烛逐渐远离玻璃板时,它的像__________ (填“变大”、“变小”或“不变”).

⑹小红得到结论:平面镜成像特点:                          像。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A, B, C, D

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Have you ever thought about what you would like to do after school? Perhaps one of these rather different jobs will suit you.

TASTER: Food companies need people to taste the products that they are making. So many kinds of no bad-tasting food are put onto the supermarket shelves. All tasters do all day is take small bites of food. They make notes of what tastes good and what tastes bad. It is not a job for those who would like to stay thin.

SNAKE MILKER: This involves taking the poison out of a snake’s teeth. You hold the snake over a glass and make it open its mouth very wide. The poison will then drip from the back of the teeth into the glass; this is known as milking the snake. You have to be very brave if you want to try this.

GOLF BALL HUNTER: You will spend your day diving into waterholes at different golf courses to hunt for lost golf balls. You could be picking up as many as 5,000 balls a day. Many golfers are willing to buy used golf balls and you could be making a lot of money.

CLOCK CLEANER: Every day you will be climbing to the top of the clock towers in the city. Your responsibilities will be to oil, wind and repair the clocks. This is not a job for someone who is afraid of heights.

小题1: If you are a taster, you will          .

A.pick up golf balls

B.oil and repair the clocks

C.get some milk from snakes

D.try different kinds of food小题2: If you are afraid of heights, you’d better not choose the job as a          .

A.taster

B.snake milker

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D.golf ball hunter小题3: You can probably find this passage in a          .

A.newspaper

B.textbook

C.report

D.novel

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