题干

一天,小聪告诉小亮,放大镜不仅能把物体“放大”,还能把物体“缩小”!有些惊讶的小亮立刻找来一个放大镜做起了实验.他把放大镜放到花朵前某一位置时,看到了如图所示的花朵的正立放大虚像.接着他按小聪的提示进行了操作,终于看到了“缩小”的花朵.关于小亮看到“放大”花朵后的操作及他看到的“缩小”花朵,下列说法正确的是(   )

A:小亮向靠近花朵的方向移动放大镜,看到的是花朵的正立缩小虚像,像的位置在放大镜与花朵之间

B:小亮向靠近花朵的方向移动放大镜,看到的是花朵的倒立缩小实像,像的位置在放大镜与小亮眼睛之间

C:小亮向远离花朵的方向移动放大镜,看到的是花朵的正立缩小虚像,像的位置在放大镜与花朵之间

D:小亮向远离花朵的方向移动放大镜,看到的是花朵的倒立缩小实像,像的位置在放大镜与小亮眼睛之间

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D

同类题5

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    Today, an increasing number of people are always looking at their mobile phones with their heads down. These people are called the "'Heads-down Tribe (低头族). Are you a heads-down tribe member? Heads-down tribe members now can be seen everywhere.

More and more traffic accidents are happening because more drivers use mobile phones when they are driving. In order to make drivers pay more attention to driving, some new traffic rules have been made. For example, people who use mobile phones while driving in Taiwan are fined (罚款). Car drivers and motorcyclists who break the traffic rule will be fined NT$ 3, 000 and NT$1, 000 respectively (分别地).

As we can see above, using mobile phones may cause accidents and even cost a lot of money. Also, more and more interesting and strange facts happen to the "Heads-down Tribe". Let's have a look at an interesting TV report. A man in America kept using his mobile phone on his way home. As a result, he knocked into a big lost bear. When he lifted his eves from the phone, he was so afraid that he turned around and ran away quickly. Another fact is that we can often see people in the restaurant eating face to face but looking at their own mobile phones. It's strange that they don't talk to the ones who sit opposite to them during the meal. Some of them even have fun communicating with others on the phone.

    Mobile phones are helpful and necessary tools for modern life. Are mobile phones good or bad? It depends on how people use them. Let's be "'healthy" users and try to be the "Heads--up Tribe".