如图所示,在发光的灯泡附近放置一凸透镜,在远处的墙上出现了灯丝清晰的像.关于此像

题型:选择题

问题:

如图所示,在发光的灯泡附近放置一凸透镜,在远处的墙上出现了灯丝清晰的像.关于此像下列说法中正确的是

A.像是正立的

B.像是放大的

C.像是虚像

D.像比灯丝亮

考点:透镜及其分类
题型:选择题

Welcome to Phillip Island Nature Park and the penguin Parade(企鹅列队). You will see the world’s smallest penguins— the little penguins appearing from the ocean and crossing the beach to their home in line. It's a natural experience. Remember the Little penguins are wild. You are a visitor to their home.

Making the most of your visit

Here are some helpful hints(提示) :

●The Penguins Parade last 50 minutes from the time penguins first cross the beach.

●Dress in warm clothes, for the Paradeis in the open air on the beach.

●It is best to get down to the beach at least 15 minutest before the parade begins.

Protecting the Penguins

We do have some simple rules—designed to protect the penguins and make your visit more enjoyable.

●Photography—including video cameral is not allowed. Photography during the Parades. Make sure that your cameral is placed inside your bag, or in a bag provided, before walking down to the beach, Photographs can be bought at proper price in the gift shop.

●Smoking is not allowed anywhere.

●And remember, the penguins are wild birds so please don't try to touch them.

小题1:During the Penguin Parade, people________.-

A. are allowed to smoke              B had better wear warm clothes.

C. have to hand in their bags              D. Can take photos of the penguins

小题2:Which of the following statements is WRONG?

A.The Little Penguins go back home in line.

B.The whole Penguin Parade lasts 50 minutes.

C.People have a chance to touch the penguins.

D.The Penguin Parade takes place on the beach.小题3:The passage is written mainly to________.

A.help make people's visit more pleasant

B.introduce the life of the Little Penguins

C.welcome people to Phillip bland Nature Park

D.encourage people to protect the Little Penguins

题型:选择题

有关平流层特征及卫生学意义哪一项论述是错误的()

A.平流层在对流层之上

B.平流层又分两个亚层:同温层和臭氧层

C.臭氧层能吸收短波紫外线,保护人体不受短波紫外线伤害

D.同温层在臭氧层下面

E.各种气象现象都是在平流层中发生

题型:选择题

民事法律行为的委托代理必须采用书面形式。( )

题型:选择题

简述氨基甲酸酯及其鉴定。

题型:选择题

直升机在停机坪上起飞和着陆时,距离其他航空器或者障碍物的水平距离不少于()。

A.10米

B.20米

C.25米

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