小玲同学在用如图所示的装置做小孔成像实验时，如果易拉罐底部有一个很小的三角形小孔，则她在半透明纸上看到的是（）

小华同学学习了细菌和真菌的知识后，设计了以下实验，探究酵母菌的发酵过程是否需要适宜的温度．具体实验设置如图，3个小时后，发现甲烧瓶上原来被挤瘪了的气球鼓了起来，乙烧瓶上的气球并没有鼓起来．分析实验，回答问题．

读中国四大地理区域图.

A young lady was driving a family car home with her father when they were caught in a heavy storm.

The young lady was a little 1 and asked her father, "What should I do, stop or 2 driving?”

Her father said, "Keep driving.”

After 3 a few kilometers, the storm was becoming heavier 4 heavier. The young lady noticed that some cars and big transport trucks 5 pulling over (靠边停) to the side of the road.

The young lady asked her father again 6 they should stop. But her father said 7. So, she had to keep on driving.

Ten minutes 8, the storm started to become 9 and she could see a little more clearly. After a few of kilometers, she drove out of the storm. What's more, the sun 10 and the road ahead was dry.

Her father told her to 11 and get out of the car.

"But why 12, Father?" she asked in surprise.

Her father said, "When you get out, you can look back 13 all the people in cars and big trucks that gave up and they are still in the storm. Now, your storm is over 14 you didn't give up."

Don't give up, even if the stronger do. If you keep going, soon your "personal 15" will be over. The sun will shine on you again and the road ahead will be dry and clear.

关于这组数据，下列说法正确的是（   ）

1）对角线互相垂直的四边形是菱形；

2）对角线相等的平行四边形是矩形；

3）对角线互相垂直平分的四边形是正方形；

4）两组对角相等的四边形是平行四边形；

5）一组对边平行，一组对边相等的四边形是等腰梯形．

其中正确的有（   ）个．