习 * * 在纪念宪法颁布三十周年的大会上说：“宪法的生命力在于实施，宪法的权威也在于实

When you watch TV programs about wild animals, it is surprising to see how an antelope (羚羊) can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways to fight off enemies.

Over millions of years, plants have developed their own defense system (防卫系统). Chemicals are fantastically used by plants to survive (幸存). By making their leaves, flowers, roots and fruits poisonous (有毒的) to enemies, plants can fight back.

One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree’s leaves, the amount (数量) of poison increases in the other leaves. “It’s like the injured leaves telephoning the others to fight together against the enemy,” he said.

The tree also sends defense messages to neighboring plants by giving out a special smell. Golden Wattle trees in the nearby 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees’ leaves, he will die.

Every kind of plant or tree is good at producing a special set of chemicals. Herbivores, like rabbits, can safely eat the leaves of one tree, but they may be poisoned by its neighbor.

In this way, plants have not only developed their own defense system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.

小题1:From the first 2 paragraphs, we can learn that _________.

A．plants can do nothing against their enemies

B．chemicals are quite useful for plants to survive

C．an antelope can always run away from a strong lion

D．leaves, roots, flowers and fruits of plants are poisonous小题2:If animals eat one Golden Wattle tree’s leaves, the tree can________.

A．kill the animals with a special smell

B．tell other trees to come to protect it

C．warn other trees against the animals on the phone

D．send defense messages to the neighboring plants小题3:The underlined word “herbivores” in the 5th paragraph probably means animals which _____.

A．produce poison

B．live on small animals

C．like to eat rabbits

D．feed on plants or grass小题4:The last paragraph of the passage suggests that this kind of defense system is ________.

A．bad for animals

B．good for forests

C．helpful to some animals

D．harmful to forests小题5:The passage is mainly about __________.

A．the examples of protecting forests

B．the balance between animals and plants

C．the ways of plants fighting against enemies

D．the relationship between lions and antelopes

根据下面的对话情景，在每个空白处填上一个合适的句子，使对话的意义连贯、完整。

( After the graduation ceremony, Tan Li and Wu Qian are talking about their summer vacation plans on the playground. ) Tan Li = T  Wu Qian = W

T: Hey, Wu Qian.  Our junior high scnool life has come to an end.  What are you going to do this summer vacation?

W: 小题1:               The scenery there is very beautiful.

T: Sounds great.  Is considered as the Treasure Island of China  Where will you go?’

W: I’ll go to Sun Moon Lake and other tourist attractions. 小题2:_____________

T: NO. I’ve never been there before. 小题3:_________________________

W: By ship.  It is a little slow but interesting.

T: 小题4:______________________________

W: In half a month.

T: 小题5:____________________________

W: Thank you.

女性，47岁，既往健康，晨练时突然出现剧烈头痛伴喷射性呕吐，拟诊为蛛网膜下腔出血，尽快确诊应首选的检查是（）

A.脑血流图

B.脑脊液检查

C.脑血管造影

D.出凝血项目检测

E.免疫学检查

下列判断错误的是[ ]

A.分子间的间隙：水蒸气>冰

B.pH：碳酸钠溶液>氯化钠溶液

C.碳元素的质量分数：C₂H₄<C₃H₆

D.一个分子中原子总数：H₂O₂=NH₃

对象存储是专门针对（）的海量存储形态。

A、云计算

B、大数据

C、结构化数据

D、非结构化数据