化简(log232+log128-2log141)(lg2+lg5)lg8lg2

阅读理解。

     The dinosaurs suddenly died out. What happened to them? Scientists thought that a change in temperature

may be the reason. They have come up with lots of ideas to explain the end of the dinosaurs.

     The most famous one is the minor planet (小行星) idea. Everything Was OK before a large minor planet

suddenly hit the earth. What a terrible hit! It caused big fires, storms, acid rain, and even earthquakes and

volcano eruptions. The hit produced a lot of dust, which flew up into the air and blocked the sun for months.

The earth became very cold without sunlight. The plants died first. Then the grass-eating animals died of

hunger. Then the meat-eating animals could not find food either. They began to eat each other, but after a

while they died out too. The dinosaurs, either plant-eaters or meat-eaters, did not live through the disaster (灾

难). What a sad story!

     In April, a British scientist thought of a new idea about the death of the dinosaurs. He thinks that after the

minor planet hit the earth, the temperature change left more dinosaur boys than girls! Without enough female

dinosaurs to hatch (孵) the eggs, the dinosaur population be-came smaller and smaller.

1. _____ may be the main reason for the dinosaurs dying out according to scientists.

A. Earthquakes

B. Big fires

C. Temperature change

2. The passage mentioned _____ ideas that the scientists came up with about the end of the dinosaurs.

A. two

B. three

C. four

3. The underlined expression "volcano eruptions" probably is _____.

A. the name of a minor planet

B. one kind of dinosaurs

C. one kind of disaster

4. The earth became cold because _____.

A. the sun refused to rise

B. the dust kept the sunlight away

C. there's too much rain

5. This passage may be found in _____.

A. a science fiction

B. a science magazine

C. a story book

线路车间(机械化维修车间)应根据工务段下达的年度分月维修计划和各项养护任务，编制月度维修计划。

1947年1月波兰工人党领导人（）当选为共和国总统。

A.毕苏斯基

B.格罗

C.贝鲁特

D.拉科西

患者有胃溃疡史2年。突然呕血、便血4小时，心悸，四肢湿冷。检查：心率125次/分，血压80/60mmHg。诊断为上消化道大出血。估计其出血量约为

A．200ml
B．500ml
C．800ml
D．1500ml
E．3000ml

“有些S是M，所有P不是M，所以有些S不是P”这个三段论是（）.

A.第一格EIO式

B.第二格EIO式

C.第三格EIO式

D.第四格EIO式