问题 实验题

如图所示,在用斜槽轨道做“探究平抛运动的规律”的实验时让小球多次沿同一轨道运动,通过描点法画小球做平抛运动的轨迹。

(1)为了能较准确地描出运动轨迹,下面列出了一些操作要求,不正确的是[ ]

A、通过调节使斜槽的末端保持水平

B、每次释放小球的位置可以不同

C、每次必须由静止释放小球

D、小球运动时不应与木板上的白纸(或方格纸)相接触

(2)下图为某同学描绘的平抛运动轨迹,O点为抛出点,则小球的初速度v0=____________m/s,B点的竖直速度VBY=____________m/s(重力加速度取g=10m/s2

答案

(1)B

(2)0.6,2

单项选择题
阅读理解

He’s an old cobbler(修鞋匠) with a shop in the Marais, a historic area in Paris. When I took him my shoes, he at first told me, “I haven’t time. Take them to the other fellow on the main street. He’ll fix them for you right away.”

But I had my eyes on his shop for a long time. Just looking at his bench loaded with tools and pieces of leather, I knew he was a skilled craftsman(手艺人). “No.” I replied, “The other fellow can’t do it well.”

“The other fellow” was one of those shopkeepers who fix shoes and make keys — without knowing much about mending shoes or making keys. They work carelessly, and when they have finished sewing back a sandal strap(鞋带), you might as well just throw away the pair.

My man saw I wouldn't give in, and he smiled. He wiped hands on his blue apron(围裙), looked at my shoes, had me write my name on one shoe with a piece of chalk and said, “Come back in a week.”

I was about to leave when he took a pair of soft leather boots off a shelf.

“See what I can do?” he said with pride. “Only three of us in Paris can do this kind of work.”

When I got back out into the street, the world seemed brand-new to me. He was something out of an ancient legend, this old craftsman with his way of speaking familiarly, his very strange dusty felt hat, his funny accent and his pride in his craft.

These are times when nothing is important but the bottom line, when you can do things any old way as long as it “pays”, when, in short, people look on work as a path to ever-increasing consumption rather than a way to realize their abilities. In such a period it is a rare comfort to find a cobbler who gets his greatest satisfaction from pride in a job well done.

小题1:Which of the following is true about the old cobbler?

A.He was equipped with the best repairing tools.

B.He was the only cobbler in the Marais.

C.He was proud of his skills.

D.He was a native Parisian.小题2:The sentence “He was something out of an ancient legend” implies that ______.

A.nowadays you can hardly find anyone like him

B.it was difficult to communicate with this man

C.the man was very strange

D.the man was too old小题3:According to the author, many people work just to ______.

A.realize their abilities

B.gain happiness

C.make money

D.gain respect小题4:This story wants to tell us that ______.

A.craftsmen make a lot of money

B.whatever you do, do it well

C.craftsmen need self-respect

D.people are born equal