将图1所示的正六边形进行分割得到图2，再将图2中最小的某一个正六边形按同样的方式

下列说法中，正确的是（　　）

A．质点做直线运动时，其位移的大小和路程一定相等

B．质点做曲线运动时，某段时间内位移的大小一定小于路程

C．两个位移相同的质点，它们所通过的路程一定相等

D．两个质点通过相同的路程，它们的位移大小一定相等

患者，男性，30岁，外伤致颈椎骨折，合并脊髓损伤，四肢呈弛缓性瘫痪，持续高热41℃数天，护士为其采用的降温措施是（）。

A.物理降温同时调整室温

B.冰盐水灌肠

C.温水擦浴

D.及时应用有效抗生素

E.冬眠疗法

阅读理解.

     Besides calling 911,here is what to do in some lifethreatening emergencies when no one is

around to help.

Lost in the wilderness

     First,you've got to acknowledge you're in trouble.Stay where you can be seen clearly and

remember to rest. Keeping a sense of humor helps too-it reduces stress and helps creative

thinking.In a wide open area,make a colorful cross out of rocks to show your present position.

     Choking

     Aim to hit the top of the chair against your stomach,in the soft part below the bony upsidedown

V of the ribs (肋骨)．Make a sudden push against the chair.If you still can't breathe after six

tries,call 911,even if you can't talk.Write the word choking somewhere nearby,and leave the line

open until help arrives.

     Severe bleeding

     Use your hand or clean cotton,or paper towels,or a scarf,or any cloth you can find,and push

down on the wound until the bleeding stops.But if you put a band around your leg tightly,you're

going to close the vessels(血管) to the entire leg.In this way,you could lose your foot.

     Bear attack

     If you surprise a bear,don't run away.That invites an attack.Instead,stand up and back

away slowly,without looking the bear in the eyes.If it does charge (猛冲) at you,stick out

your chest,raise your arms,and spread your legs.Shout at the bear,to frighten it.If it's going

to attack,lie facedown,with your hands held firmly behind your neck.Play dead until you're

sure the bear is gone.

1.When you see a colorful cross made of rocks in the wilderness,you know ________.

A．someone is bleeding

B．someone is choking

C．someone is lost

D．someone is attacked by a bear

2.If you are still choking after six tries，you should ________.

A．keep a sense of humor

B．call 911 and leave the line open

C．use your hand or clean cotton

D．lie down with your hands behind your neck

3.Don't tie around your bleeding leg tightly，or you could ________.

A．stop bleeding  

B．reduce stress

C．lose your foot  

D．cause breathlessness

4.The passage is mainly teaching us how to ________.

A．survive the emergencies

B．avoid a bear attack

C．deal with a choke  

D．find our way

第一胎是双胞胎，能不能享受独生子女待遇？为什么？

进食或处理食物前，应用肥皂及清水洗净双手。