青蒿的化学成分是：（） A.青蒿素 B.青蒿素甲素 C.青蒿素乙素 D.青蒿素酸 E

糖尿病病人出现强烈饥饿感、心悸、手颤、出汗，可能是（）。

A.胃溃疡

B.糖尿病加重

C.高血压

D.低血糖

E.合并甲亢

阅读短文，选择正确答案。

      Escaping a fire is a serious matter. Knowing what to do during a fire can save a life. It is important to know

the ways you can use and show them to everyone in the family, such as stairways and fire escape, but not lifts.

From the lower floors of buildings, escape through windows is possible. Learn the best way of leaving by

window with the least chance of serious injury (受伤).

      The second floor window is usually not very high from the ground. An average person, hanging by the

fingertips will have a drop of about 6 feet to the ground. It is about the height of an average man. Of course, it

is safer to jump a short way than to stay in a burning building.

      Windows are also useful when you are waiting for help. Be sure to keep the door closed before opening the

window. Otherwise, smoke and fire may be drawn into the room. Keep your head low at the window to be sure

you get fresh air rather than smoke that may have leaked (漏) into the room.

      On a second or third floor, the best windows for escape are those which open onto a roof. From the roof

a person can drop to the ground more safely.

      Dropping onto cement (水泥) might end in injury. Bushes and grass can help to break a fall.

1. Which of the following should not be used when trying to escape a fire? [ ]

A. Windows.

B. Lifts.

C. Fire escapes.

D. Stairways.

2. How far from the ground is the second floor window? [ ]

A. About 12 feet.

B. About 6 feet.

C. Nearly 10 feet.

D. About the height for an average man.

3. According to the passage, windows are _______ of escaping a fire. [ ]

A. the only way

B. the best way

C. safer than any other ways

D. one of the possible ways

4. The writer suggests that _______. [ ]

A. breathing in smoke might be harmful

B. smoke will enter the room by an open window

C. fresh air can't reach the second floor

D. Both A and B

5. If we are on the second floor when a fire breaks out, we'd better drop ________.[ ]

A. directly onto the ground

B. first onto a roof then onto the cement

C. first onto a roof then onto bushes or grass

D. onto the cement rather than bushes or grass

下列关于梅毒血清试验叙述，错误的是（）

A.非梅毒螺旋体抗原血清试验用心磷脂做抗原，测定血清中抗心磷脂抗体（反应素）

B.非梅毒螺旋体抗原血清试验特异性高而敏感性较低

C.早期梅毒患者经充分治疗后，反应素可以消失

D.梅毒螺旋体抗原血清试验敏感性和特异性均较高

E.梅毒螺旋体抗原血清试验不能用于观察疗效

阅读理解。

     根据短文内容，从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余项。

     Do you know how to be street smart? Being street smart means knowing how to keep yourself safe

from strangers when you're alone or with other kids.    1  

     Most strangers aren't dangerous and wouldn't do anything to hurt kids. Unfortunately, though, some

strangers can be dangerous, and it's impossible to tell who's OK and who's not. __2_  That's why it's

important to follow these safety rules all the time:

     Make your whereabouts known.

     The adults who's taking care of you needs to know where you are and when you'll be coming home.

        3  

     It's more fun and safer to do things with friends. Traveling with a friend whenever you can is a good

idea, and traveling with a group of kids is even better.

        4  

     Safe spots are places where you can stop if you need help. Like the houses of kids you know, the

houses of your parents' friends, police stations, libraries, and fire departments. When you're walking or

riding your bike, make a mental note of the safe spots along your route. That way, you'll know where

they are in case you ever need one.

        5  

     You're probably been told lots of times that you should not yell and keep quiet. But when you think

you might be in danger, it's the perfect time to be noisy! If a stranger approaches you, follows you or tries

to grab you, yell as loudly as you can and try to get away. People in the area will hear what's going on and help you, so make plenty of noise.

A. Stick with a friend.

B. Pick out safe spots.

C. It helps you stay safe.

D. Shout "help" when necessary.

E. Go to school with your friends.

F. Make a lot of noise if you are scared.

G. A dangerous person doesn't necessarily look scary.

规则干扰