题目

下列关于水的说法正确的是 A . 水中含有氢分子 B . 水是由氢氧两种元素组成 C . 一个水分子由两个氢元素和一个氧元素组成 D . 水中含有两个氢原子 答案：BCan plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And thay can eat small animals. One famous meat-eating plant is Venus Flytrap(捕蝇草).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 touches one of the hairs, the leaf closes quickly， so the fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly and slowly eats it.Why do plants do that? 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 bigger plants don't get the same idea!1.Venus flytrap is a kind of______.A. plant B. animal C. food D. meat2. Venus flytrap grows in______.A. most parts of the worldB. parts of AfricaC. dry parts of the United StatesD. wet parts of England3.From the passage, we learn that______.A. all plants can eat peopleB. all plants can eat animalsC. some plants can eat peopleD. some plants can eat animals4.The underlined word"presses"probably means______ in Chinese.A. 挤压 B. 关上 C. 打开 D. 松开5. —Why do some plants eat animal meat?—Because______.A. plants are dangerous to animalsB. animals are dangerous to plantsC. plants want to get what they need from animal meatD. plants want to protect themselves against animals