人类遗传病是指（） A.先天性疾病 B.具有家族性的疾病 C.遗传物质改变引起的疾病

某女，50岁，2月前出现低热、乏力，后出现双腕关节、左手2、3、右手2指关节肿痛，晨起疼痛关节出现较长时间的僵硬，RF阳性。

为明确诊断应进一步检查（）

A.CT

B.X片

C.HLA-B27

D.ASO

CPR is cardiopulmonary resuscitation (心肺复苏). It forces air into the lungs and pumps(用泵抽) blood and oxygen to the brain in order to increase the chances that a person whose heart stops will survive. It increases the chances that he or she will suffer little or no brain damage.

The American Heart Association suggests two ways to perform CPR. One combines the use of hands to pump the victim’s chest with rescue breathing. The other method is called “Hands-Only CPR”, which is for people who are unwilling or unable to perform rescue breathing. Some people fear infection(感染). Others say they are afraid of making the patient worse.

But the American Heart Association strongly asks people in contact with a victim(受害者) to take action and tells how to take it. It says you can recognize a person needing CPR. He or she is unconscious(无意识) -- unable to communicate or react to surroundings or speech. His or her skin has lost color. The person is not breathing. If such conditions describe the situation, chances are the heart has stopped beating.

You should act by calling for help, or sending someone else. Even if you cannot do mouth-to-mouth rescue breathing, you can perform Hands-Only CPR. You can do chest compressions(压迫) that help to keep blood flowing to the brain and the heart. To perform the compressions, place one hand over the other and press firmly on the center of the victim’s chest. Push down about five centimeters. Aim for one hundred compressions each minute.

Doctor Sayre suggests that medical workers do both the breathing method and chest compressions as usual. He says some victims, including babies, need the mouth-to-mouth breathing with the compressions. Still, the doctor says it is better to do just chest compressions than to do nothing.

观察拍摄于水边的风景照片时，总会发现倒影部分比景物本身暗一些，这是光从空气射到水面上时，由于光的____（填“反射”或“折射”）一部分光进入了水中的缘故。

肝动脉灌注显像了解肝外是否存在分流应用下列哪种显像剂（）。

A.²⁰¹Tl

B.²⁰¹Tc-PAA

C.^99mTc-IDA

D.^99mTc-MAA

E.^99mTc-MIBI

恩格斯说：“不要过分陶醉于我们对自然界的胜利，对于每一次这样的胜利，自然界都报复了我们。”下列各项能佐证这一观点的是  

①蒸汽机广泛应用 ②化工业兴起发展 ③太阳能开发利用 ④连续大范围雾霾天气的出现

A．①②③

B．②③④

C．①②④

D．①③④