一般油墨的主体成分为（），它决定油墨的主要性质。A.色料 B.连结料 C.辅助剂 D

小丽做测量小灯泡电功率的实验（小灯泡标有“2.5V”字样）．

（1）如图甲所示，小丽所接的实验电路存在连接错误，但只需改动一根导线，即可使电路连接正确．

请你在应改动的导线上打“×”，并用笔画线代替导线画出正确的接法．

（2）电路连接正确后，闭合开关，发现小灯泡不亮，但电流表有示数．接下来应进行的操作是：______

A．更换小灯泡   

B．检查电路是否断路

C．移动滑动变阻器滑片，观察小灯泡是否发光

（3）实验过程中，当电压表示数为______V时，小灯泡正常发光，此时电流表的示数如图乙所示，其值为______ A，小灯泡的额定功率为______W．

判断病人有无脉搏时，抢救者用手指轻轻按靠近自身侧的颈动脉，检查脉搏至少5s，但不可超过（）。

A、5s

B、10s

C、15s

D、20s

短文填词。

     阅读下面短文，根据以下提示：1）汉语提示，2）首字母提示，3）语境提示，在每个空格内填人

一个适当的英语单词，并将该词完整地写在右边相对应的横线上。所填单词要求意义准确，拼写正确。

     School education is very important and useful. Yet no one can learn everything from school. A teacher,

no matter how much he (1)_____, can't teach his students everything (2)_____ want to know. The teacher's

job is to show his students (3)_____ to leam. He teaches them how to read and think. So much more is to be

leamed (4)o_____ school by the students. (5)_____ (自己). It is always more important to know how to study

by oneself than to remember some facts. Creat scientists, (6)_____ as Einstein, Newton and Galileo, didn't get

everything from school. (7)_____ they were all so (8)_____ (成功). They worked hard all their lives,wasting

not a single moment. They would ask (9)_____ many questions as they read and they did thousands of

(10)_____ (实验).

1953年5月30日凌晨，中国人民志愿军空军第4师副团长（）击落美军F-84型飞机1架。这是志愿军空军第一次在夜间击落敌机。

A.李汉

B.张积慧

C.侯书军

在http://www.test.com/main/index.htm中，index.htm是______。

A．协议名
B．域名
C．主机名
D．页面文件