直接写出得数：605×2=680+340=560-240=400×5=63÷7=

患者男，72岁，因“发热、咳嗽、呼吸困难2h”来诊。查体：T39℃，P140次/min，R32次/min，BP75/55mmHg；左肺湿性啰音。胸部X线片：左肺弥漫性渗出阴影。诊断：左侧肺炎，感染性休克。

正确的处理是（）。（提示立即为患者建立中心静脉通路并进行液体复苏治疗，中心静脉压为4mmHg，BP90/70mmHg。）

A.减慢输液速度

B.加快输液速度

C.减慢输液速度，加用升压药

D.维持原输液速度

E.减慢输液，加用利尿药

F.给予升压药

It seems like every day there's some new research about whether our favorite drinks are good for us.  One day,  science says a glass of red wine a day will help us live longer. The next day, maybe not.  It seems journalists are pretty interested in wine research and the same might be said for coffee.  Now there's been a lot of research into whether coffee's good for our health "the results have really been mixed"，admits Neal Freedman who led the coffee study and published his findings in a medical journal recently.   "There's been some evidence that coffee might increase the risk of certain diseases and there's also  been  maybe  more recent evidence that coffee  may protect against other diseases as well".

Freedman and his colleagues undertook the biggest study yet to look at the relationship between coffee and health.  They analyzed data collected from  more than  400，000 Americans ages 50 to 70 participating in the study.  "We found that the coffee drinkers had a modestly lower risk of death than the non-drinkers， he said.  Here's what he means by "modestly": those who drank at least two or three cups a day were about 10 percent or 15 percent less likely to die for any reason during the 13 years of the study when the researchers looked at specific causes of death, coffee drinking appeared to cut the  risk  of  dying from  heart  disease, lung  disease injuries,  accidents  and infections.

Now, Freedman stressed that the study doesn't prove coffee can make people live longer .A study like this can never prove a cause-and-effect relationship.  All it can really do is to point researchers in the right direction for further investigation. And even if it turns out that coffee is really good for you, scientists have no idea why.

小题1:According to the first paragraph，reporters  would like to  know  the research findings of_______.

A． tea

B． beer

C． coffee

D． wine小题2:According to the passage, which of the following is TRUE?

A． Freedman and his colleagues hired 400，000 Americans to collect date.

B． People who took part in Freedman's research are about 50 to 70 years old.

C． About 400, 000 Americans worked for Freedman's team for 13 years.

D． People who are 50 to 70 years old seldom drink wffee.小题3:According to the author, scientists________.

A． have already proved that coffee is good for human health

B． have a long way to go before they find a way to study coffee

C． have avoided the cause-and-effect approach to study coffee

D． are still unable to figure out why coffee is good for us小题4:Which of the following can be the best title?

A． The Magical Effects of Coffee

B． Neal Freedman and His Research

C． Can Coffee Help You Live Longer?

D． A Cup of Coffee A Day Makes Diseases Away

计算题：试计算声波在钢/水界面的声压反射率和声压通过率？ （Z1（钢）＝4.5×10公斤/米2.秒，Z2（水）＝1.5×10公斤/米2.秒）

我国古代四大发明中打破相对封闭状态，使世界连成一体的成就是（）

A.造纸术

B.指南针

C.火药

D.印刷术

试述离心泵的换罐操作？