下列哪项是异位妊娠最具特异性的B超图像A．盆腔有积血 B．子宫旁见液性暗区 C．宫腔

Even a child knows that nodding the head means" Yes"．But some people will probably be puzzled（迷惑的）when they first come to India．When they talk to an Indian，he often shakes his head．They might think that the Indian does not like what he said，but on the contrary，he is expressing agreement．

The Indians have a habit of shaking their heads slightly when they talk to somebody．It doesn’t mean" No"，but" Yes"．

If a person doesn’t know this，it might cause misunderstanding（误解）．

At one time a foreigner in India told his driver who was an Indian to take him to his office．The driver shook his head．The foreigner said his request again and the driver still shook his head．At last，the foreigner shouted angrily，“Drive me to my office at once!” The driver said in a low voice，" Yes，sir，"smiling and shaking his head again at the same time．

小题1:In general，nodding the head means and shaking the head means_____．

A．"Yes"．．．" No"

B．"No"．．．" Yes"

C．"Yes"．．．" Yes"

D．"No"．．．" No"小题2:According to the habit of India，if someone agrees with you，he will ______．

A．nod his head

B．shake his head

C．neither nod his head nor shake his head

D．both nod his head and shake his head小题3:Why did the Indian driver shake his head when the foreigner asked him to drive him to his office? Because_________．

A．the Indian driver had something important to do

B．the foreigner agreed to give him only a little money

C．the driver felt uncomfortable at that time

D．in India shaking the head means agreement小题4:The foreigner became angry because_______．

A．the Indian driver didn’t want to send him to his office

B．he misunderstood the meaning of shaking the head in India

C．he asked the driver to send him to his office，but the driver didn’t say any words

D．the Indian driver asked him for a lot of money小题5:The phrase" on the contrary" means_____．

A．正相反

B．总之

C．与之相同

D．在另一方面

基层学校的少先队组织和活动方方面面的材料应当注意收集、（）。

A.保管与使用

B.上交上级部门

C.编写与修改

D.整理与补充

近几年环保低碳风劲吹，混合动力汽车已成为车展上的“常客”．混合动力汽车启动时，内燃机并不工作，动力电池通过驱动电机向车轮输送能量；当高速行驶或动力电池储存电能过低时，内燃机启动，既可以向车轮输送能量，也可以同时给动力电池充电．当混合动力汽车在平直公路上以72km/h匀速行驶10min后，其内燃机消耗了汽油1.2kg，假设汽油完全燃烧所释放能量的一半转化为牵引力做功和给动力电池充电，其中动力电池储存的电能增加了7.2×10⁶J。试求：

（1）汽油完全燃烧所释放能量是多少焦耳？（2分）

（2）牵引力做功多少焦耳？牵引力的功率是多少？（3分）

（3）汽车受到的阻力是多大？（汽油的热值q=4.6×10⁷J/kg）（2分）

阅读理解。

     If you are lost in the mountains,stay calm in the face of darkness,loneliness,and the unknown.

It will greatly increase your chances of survival.Many people think that preparing necessary

equipment and knowing how to use it are very important,but actually eighty percent of

mountain survival is your reaction to fear.

     FIND A HIDING PLACE

     Unnecessary labor will make you sweat and make you cold.Find a hiding place around you

before trying to start your own construction.If you are in a snowcovered area,you may be able

to dig a cave in deep snow for protection from the wind.You should try to hide yourself in the

middle of the mountain if possible.Stay out of the valleys-cold air falls,and the valley floor can

be the coldest area on the mountain.

     SIGNAL RESCUERS FOR HELP

     The best time to signal rescuers is during the day.Signal for help from the highest point

possible-it will be easier for rescuers to see you,and any sound you make will travel farther.

If you take a box of matches and a space blanket(a special blanketfor travelling),build three

smoky fires and put your blanket-gold side facing out-on the ground.

     DO NOT WALK AWAY

     It will make finding you more difficult if you have gone off in a different direction,as search

teams will be trying to follow your path.Searchers often end up finding a car with no one in it.

If you get frostbite,do not rewarm the affected area until you’re out of danger.You can walk on

frostbitten feet,but once you warm the area and can feel the pain,you will not want to walk

anywhere.Try to protect the frostbitten area and keep it dry untilyou are rescued.

在检测，控制系统中，构成一个回路的每一个仪表（或元件）都有自己的仪表位号，它由（）组成.

A.字母代号

B.字母代号和数字编号

C.字母，短线，代号

D.数字，短线，编号