对进程间互斥的使用临界资源，进程可以（）。A.互斥的进入临界区 B.互斥的进入各自的

在PowerPoint 2003幻灯片中插入______图，可以描述一个部门的人事结构，或一个系统的层次结构。

阅读理解。

     Has your life changed a lot? What will happen in your life in the future? Life in the 21st century will be  different because many changes will take place,but what will the changes be?

     The population is growing fast. There will be more and more people in the world and most of them will live longer than before. Computers will be much smaller and more useful, and there will be at least one in every home. And computer study will be one of the important

subjects in school.

     People will work fewer hours than they did in the  20th century, and they will have more free time for  sports,watching TV and traveling. Traveling will be  much cheaper and easier. And many more people will go to other countries for holidays.

    There will be changes in our food,too. More land  will be used for building new towns and houses. Then  there will be less room for cows and sheep. So meat will  be more expensive. Maybe no one will eat it every day,  instead,they eat more vegetables and fruit. Maybe people

will be healthier.

    Work in the future will be different,too. Dangerous  and hard work will be done by robots. Because of this,  many people will not have enough work to do. This will  be a problem.

根据文章内容完成下面的短文。

    The population is growing fast now. There will be _ 1     people in the 21st century. Most people will live    2   than before. Computers will  be    3   and they are easy to carry.People will have more  4 time for  traveling.And this is much   5   and   6    . As for food,meat will be more expensive because there will be  fewer sheep and cows,so people will eat   7   and    8    every day.They are   9    for health.Robots in  the future will do the   10   . work instead of man. Will  man be out of work in the future?

1. ________2. ________3. ________4. ________5. ________

6. ________7. ________8. ________9. ________10. ________

对于受精卵发育与植入，恰当的是（）

A.精子到达输卵管与卵子相遇，顶体外膜破裂释放出顶体酶，称为精子获能

B.获能的精子穿透初级卵母细胞的透明带，为受精的开始

C.孕卵植入后蜕膜产生"早孕因子"，抑制母体淋巴细胞活性

D.妊娠期的子宫内膜称为蜕膜

E.囊胚与子宫肌层间的蜕膜为真蜕膜

马拉松比赛的距离是42.195km，比赛的地点一般都安排在城市里的街道，如果你是主办方，你将怎样将马拉松比赛路线的距离测量出来呢？说出你的方法，并查阅有关资料或请教有经验的人，实际的测量方式与你的测量方式相同吗？

男性患者，60岁，有高血压病史10年，平时血压160／90mmHg，不规律应用降压药物，因情绪激动，突然出现呼吸困难而入院。查体：血压210／110mmHg，脉率120次／分，双肺散在哮鸣音及大量水泡音，心率140次／分，节律不整，肝脾未及。心电图P波消失，代之f波，室率140次／分，节律不整，胸片双肺底呈毛玻璃样改变，心界向左扩大。血气分析：PH值7．5，氧分压56mmHg，二氧化碳分压25mmHg，血乳酸1．2mmol／L。血酮体10mmol／L。

为进一步明确诊断，下列哪项检查对诊断有帮助（）

A.化验血糖

B.化验血脂

C.超声心动图

D.肺功能检查

E.心肺吸氧运动试验

F.血电解质检查

G.肾功能检查