设X在[0，π]上均匀分布，则E（sinx）=（）。 A．A B．B C．C D．D

当组成热电偶的材料A.B定了以后，则温度的上升对下面现象无影响的是（）。

A、自由电子活跃程度增强

B、A.B之间迁移的自由电子越多

C、接触处的电场强度增加

D、电子扩散的速度越快

A long walk in the desert or the mountains can be exciting. And it’s a great way to keep fit. If you carry a tent and some food, you can camp overnight. But wild places can be dangerous. Here’s how you can enjoy walking and camping safely.

Before your trip

☆ Tell someone where you are going and when you expect to return. If you don’t return on time, the people at home will know that you are lost or in trouble. They will know where to look for you.

☆ Make sure you’ve got a good map of the area that you’re going to.

☆ Make sure you’ve packed the right equipment for your activities. The desert is often hot, but nights can be very cold, and sometimes there are big rainstorms. In the mountains, the weather can change suddenly. A sunny day can turn cold and cloudy quickly.

The tools for survival(生存)

Sunglasses, sun hat, sun cream, windproof jacket, good walking shoes or boots, food, water, maps, compass, first-aid kit, matches, rope, knife, ground sheet,

the pack to carry your equipment.

What to do if you get lost

☆ If you’re in a car and it has broken down, stay with your car.

☆ If you are not traveling by car, make yourself easy to see. A signal fire can be seen at night. During the day, smoke may be used to show where you are. A brightly-colored blanket(毯子) may help rescuers to find you.

☆ Stay where you are.

☆ If you walk for any reason, avoid walking during the hottest part of the day. Morning and evening walking is better for saving your energy water.

☆ Keep yourself away from the rain, wind and sun, but remember: try to make yourself be in sight.

小题1:According to the passage, we should make a fire to _________. 

A．show where we are

B．keep warm at night

C．cook our meal

D．drive animals away小题2:If we get injured, we can choose ________from the following tools.

A．a ground sheet

B．a first aid kit

C．matches

D．sun cream小题3:What can we know from the passage?

A．A map and a compass will show the right direction to us.

B．It is a secret for us to tell where to go or when to return.

C．We should leave our car when it breaks down in the desert.

D．We have to keep walking while the sun is shining brightly.

某地一位司机在车祸中受重伤，被同行的人送到附近一家医院抢救。经查：伤员多发性骨折，多脏器破裂，如不及时手术，会有生命危险。但手术需要亲属签协议书。可伤员的同行者谁也不敢代签。这时，主刀医师的上级医生签了协议书，表示承担责任。经过医务人员的全力抢救，伤员脱险。

该上级医生作出自己的选择之伦理依据是（）

A.医患之间契约关系中医师有独立人格

B.医患之间契约关系中患者自愿进入

C.医患之间信托关系中患者处于弱势地位

D.医患之间信托关系中双方不是陌生人关系

E.医患之间信托关系中患者对医师信任无疑

患者女，58岁，右大腿外侧红肿剧痛并出现畏寒发热，全身无力3天，3天前患者右大腿外侧红肿，疼痛，经青霉素及其他一般治疗后，病变区仍向四周扩大，红肿，疼痛加重，并出现畏寒，发热，全身无力。体检：体温38.9℃，心率92次/分。右大腿外侧病变区皮肤呈暗红色，明显水肿，与正常皮肤无明显分界，剧痛，白细胞数15.0×10⁹/L，中性粒细胞0.86。

经青霉素及其他一般治疗后，红肿范围扩大。查体：局部有波动感，白细胞数15.0×10/L，中性粒细胞0.86。治疗应立即采取（）

A.更换抗生素

B.加强全身营养

C.少量多次输新鲜血

D.中药外敷

E.广泛多处切开，加强抗生素治疗

同一轴上的轮胎型号和花纹没有规定。