Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap.
The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly(蚊子) touches one of the hairs, the leaf close quickly. The fly cannot get out. In about half an hour, the leaf presses(挤压) the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.
How can that happen? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn’t have all these important things, especially nitrogen(氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let’s hope that some of the bigger plants don’t get the same idea!
小题1:What kind of plant is the Venus flytrap?
A．It is the plant that can be eaten as vegetables
B．It is the plant that can eat people
C．It is the plant that can eat meat.
D．It is the plant that is poisonous(有毒的)小题2:What are inside its leaves?
A．some small leaves
B．some pages of books
C．some flowers
D．some hairs小题3:The Venus flytrap eats flies because__________.
A．It grows in dry parts
B．It hates flies
C．It’ll be eaten by flies
D．It needs air and water
求解电势差，再结合WAC=WAB+WBC，求出UAC．
="-2V" 故本题答案是2；-2．