下列化合物不能由两种单质直接化合生在成的是[ ] A. FeCl2 B. CuC

患者，男性，45岁，双眼高度近视。左眼鼻下方飞蚊、闪光伴视野缺损1周就诊。检查发现左眼视网膜脱离。

该病发生的病理是（）

A.玻璃体混浊，视网膜牵引

B.玻璃体混浊，视网膜裂孔

C.玻璃体液化，视网膜牵引

D.玻璃体液化，视网膜裂孔

E.玻璃体出血，视网膜牵引

对确定流水步距没有影响的是( )。

A．技术间歇

B．组织间歇

C．流水节拍

D．施工过程数

Researchers conducting a study of hospital stays for over two hundred and eighty six thousand older folks found something interesting in their data.

The number of hospitalizations for heart disease and stroke went down significantly among a certain group of people at a certain time of year. What folks, and what time of year, you ask? Flu season and the lucky people were the ones who got flu shots(流感疫苗).

It’s generally recommended that people over fifty get their flu shots every year. Influenza(流行性感冒) is no small thing. it’s responsible for around thirty six thousand deaths a year in the U. S. alone. Getting the shots also cuts down on the chances of get­ting pneumonia(肺炎), which is especially dangerous in seniors.

But what wasn’t known was that there seems to be an added benefit to getting a flu shots in terms of warding off heart problems. The data,in fact, are quite strong in suggesting this is the case.

In this study, flu shots cut clown the number of hospitalizations for heart disease by nineteen percent. Stroke went down sixteen percent one season and a whopping twenty-three percent a second season.These are big results.

So what's the connection between getting a flu shot and having a stronger heart? It isn’t yet known.

Researchers speculate that the flu virus itself may do damage to blood vessels(血管), possibly making clots(血块)more likely. Blood clots in the heart can cause heart attacks, and blood clots in the brain can cause strokes.

Whatever the specific details are, there's one more good reason to follow your doctor’ s advice and get that annual flu shot.

小题1:According to the study, the number of hospitalizations for heart disease and stroke went down significanntly among the ones who _____.

A．got flu shots after they were ill

B．got flu shots before they were ill

C．got flu shots at the flu season

D．got flu shots whenever convenient小题2:The benefits of getting flu shots can be listed except that_____.

A．it can cut down on the chances of getting pneumonia

B．it can cut down the number of hospitalizations for heart disease

C．it can kill the flu virus

D．if can make blood clots小题3:The underlined phrase "warding off" probably means_______.

A．keeping away

B．dealing with

C．setting off

D． picking up小题4:According to the passage, we'd better ______.

A．work out to fight against influenza

B．get flu shot every year

C．follow our doctor's all advice

D．protect our blood vessels

2010年2月，欧盟连续三次召开重要会议，讨论如何应对希腊债务危机给欧元区带来的影响。建立欧元区是欧洲一代又一代人的梦想，下列有关的叙述正确的是

①欧元启动于两极格局解体后②欧元区的形成标志着欧洲一体化的完成

③欧元的使用有利于欧盟经济的稳定发展④欧元的使用引发了希腊等国的债务危机

A．①②③

B．②③④

C．②④

D．①③

各法人机构要在每年（）月底前完成同业业务交易对手的授信工作。

A.3

B.4

C.5

D.6