问题 选择题

如图所示是杆秤的示意图,下列说法中正确的是

A.秆秤是称量物体的重力的.

B.用提纽A时比用提纽B时的称量大.

C.只有秤杆是粗细均匀的,杆秤的刻度才是均匀的.

D.无论秤杆是否粗细均匀,杆秤的刻度都是均匀的.

答案

BD

秆秤是称量物体的质量的,故A错误

用提纽A时比用提纽B时的称量大,B正确

力臂是从支点到力的作用线的垂直距离,所以无论秤杆是否粗细均匀,杆秤的刻度都是均匀的,故C错误D正确

故选BD

单项选择题

I will never forget the year I was about twelve years old. My mother told us that we would not be (16) Christmas gifts because there was not enough money. I felt sad and thought, "What would I say when the other kids asked what I’ d (17) " Just when I started to (18) that there would not be a Christmas that year, three women (19) at our house with gifts for all of us. For me they brought a doll. I felt such a sense of (20) that I would no longer have to be embarrassed when I returned to school. I wasn’t (21) . Somebody had thought (22) of me to bring me a gift.

Years later, when I stood in the kitchen of my new house, thinking how I wanted to make my (23) Christmas there special and memorable, I (24) remembered the women’s visit. I decided that I wanted to create that same feeling of (25) for as many children as I could possibly reach.

So I (26) a plan and gathered forty people from my company to help. We gathered about 125 orphans (孤儿) at the Christmas party. For every child, we wrapped colorful packages filled with

toys, clothes, and school supplies, (27) with a child’ s name. We wanted all of them to know they were (28) Before I called out their names and handed them their gifts, I (29) them that they couldn’t open their presents (30) every child had come forward. Finally the (31) they had been waiting for came as I called out, "One, two, three. Open your presents!" As the children opened their packages, their faces beamed and their bright smiles (32) up the room. The (33) in the room was obvious, and (34) wasn’ t just about toys. It was a feeling, and the feeling I knew (35) that Christmas so long ago when the women came to visit. I wasn’t forgotten. Somebody thought of me. I matter.

20().

A. relief

B. loss

C. achievement

D. justice

单项选择题