问题 判断题

罗纹组织较纬平针组织的纬编针织物易脱散。

答案

参考答案:

阅读理解

Once upon a time a man became a great archer(射手).He asked the king to declare him as the greatest archer of the country. The king was about to do so when an old servant of the king said,“Wait,sir.I know an old man who lives in the forest. He is a much greater archer. Let this young man go to him and learn from him for at least three years.”

The man could not believe that there could be a greater archer than him,but he went and found the old man and he was! For three years he learned from him.Then one day,when he thought he had learned everything,the thought arose in him:“If I kill this old man,then I will be the greatest archer.”

The old man had gone to cut wood and he was coming back carrying wood on his shoulder. The young man hid behind a tree,waiting to kill him. He shot an arrow(箭). The old man took a small piece of wood and threw it.It struck the arrow and the arrow turned back and wounded the young man.The old man came,took out the arrow and said.“I knew that some day or other you were going to do this. That’s why I have not taught you this secret. There is no need to kill me. My master is still alive,and I’m nothing before him. You must be with him for at least thirty years. And he is very old,So go fast! Find the old man!”

小题1:The underlined word in the 1st paragraph is closest in meaning to “_______________ ”.

A.崇拜

B.建议

C.宣布

D.夸奖小题2:The young archer wanted to kill the old man because____________.

A.he had nothing more to learn from him

B.he could then become the greatest archer

C.the old man refused to teach him everything

D.the king’s old servant ordered him to do so小题3:What do you think would most probably happen next?

A.The young archer died from the wound soon after.

B.The king declared the young man the greatest archer.

C.The young archer found the old man’s master and killed him.

D.The young archer set off to look for the old man’s master.小题4:What lesson can you learn from the story?

A.There’s always someone better than you in this world.

B.You must never try to become better than your teacher.

C.The older a man is,the better archer he usually becomes.

D.Always use a piece of wood to protect yourself from an arrow.

问答题

(1)图1是电子射线管示意图.接通电源后,电子射线由阴极沿x轴方向射出,在荧光屏上会看到一条亮线.要使荧光屏上的亮线向下(z轴负方向)偏转,在下列措施中可采用的是______.(填选项代号)

A.加一磁场,磁场方向沿z轴负方向

B.加一磁场,磁场方向沿y轴正方向

C.加一电场,电场方向沿z轴负方向

D.加一电场,电场方向沿y轴正方向

(2)某同学用图2所示的实验装置研究小车在斜面上的运动.

实验步骤如下:

a.安装好实验器材.

b.接通电源后,让拖着纸带的小车沿平板斜面向下运动,重复几次.选出一条点迹比较清晰的纸带,舍去开始密集的点迹,从便于测量的点开始,每两个打点间隔取一个计数点,如图3中0、1、2、…6点所示.

c.测量1、2、3、…6计数点到0计数点的距离,分别记做:S1、S2、S3…S6

d.通过测量和计算,该同学判断出小车沿平板做匀加速直线运动.

e.分别计算出S1、S2、S3…S6与对应时间的比值

S1
t 1
S2
t2
S3
t3
S6
t6

f.以

S
t
为纵坐标、t为横坐标,标出
S
t
与对应时间t的坐标点,画出
S
t
-t图线.

结合上述实验步骤,请你完成下列任务:

①实验中,除打点计时器(含纸带、复写纸)、小车、平板、铁架台、导线及开关外,在下面的仪器和器材中,必须使用的有______和______.(填选项代号)

A.电压合适的50Hz交流电源      B.电压可调的直流电源   C.刻度尺    D.秒表    E.天平    F.重锤

②将最小刻度为1mm的刻度尺的0刻线与0计数点对齐,0、1、2、5计数点所在的位置如图4所示,则S2=______cm,S5=______cm.

③该同学在图5中已标出1、3、4、6计数点对应的坐标点,请你在该图中标出与2、5两个计数点对应的坐标点,并画出

S
t
-t图线.

④根据

S
t
-t图线判断,在打0计数点时,小车的速度v0=______m/s;它在斜面上运动的加速度a=______m/s2