如图所示,木块B静止在水平地面上,木块A叠放在B上.A的左侧靠在光滑的竖起墙面上.关于A、B的受力情况,下列说法中正确的是( )

材料 武昌起义爆发后,为挽救垂危的统治,清政府资政院(带有国会性质的机构)仅用三天就起草了《宪法重大信条十九2条》,简称《十九信条》,采用英国虚君共和制模式,皇帝权力大大缩小,国会与责任内阁权力大为增强。皇帝之权以宪法所规定者为限,皇位继承顺序也由宪法规定,宪法由资政院起草议决,由皇帝颁布,国会议员由国民公选。总理大臣由国会公举,皇帝任命。国会有权弹劾总理,总理也有权一次性解散国会。
——整理自王立民《中国法制史》
,
满足|
|=5,|
|=3,|
﹣
|=7,则
•
=.
—_______________
①为提高中国在国际上的影响力作出了重要贡献
②是维护区域安全与稳定的重要力量
③展现了人类共同面临的各种问题中国作为国际秩序维护者的大国形象
④解决了人类共同面临的各种问题
B
A small, white envelope(信封) stuck among the branches of our Christmas tree and it has been there for the past ten years or so.
It all began because my husband Justin hated Christmas—oh, not the true meaning of Christmas. Overspending was one thing, but compared to the difficult experience of choosing gifts—running around at the last minute to get a tie for Uncle Harry and a pair of gloves for Grandma…… spending money is nothing. I felt too tired to think of any special gifts.
Knowing Justin felt the same way, I decided one year not to buy the usual shirts, sweaters, ties and so on. I reached for something special just for Justin. The inspiration came in an unusual way.
Our son Kevin, who was 12 that year, was wrestling(摔跤) at the junior level at the school he attended; and shortly before Christmas, there was a match against a team sponsored(赞助) by an inner-city church. These youngsters, dressed in such worn out shoes that shoe strings seemed to be the only thing holding them together, while our boys were in their blue and gold uniforms and new wrestling shoes.
As the match began, I was shocked to see that the other team were wrestling without wearing helmets(头盔) to protect their ears. Well, our boys ended up defeating them. We took every weight class.
Justin, seated beside me, shook his head sadly, "I wish just one of them could have won," he said. "They have a lot of potential(潜力), but losing like this could take the heart out of them." Justin loved kids-all kids, and he knew them, having coached little league football and baseball. That's when the idea for his present came. That afternoon, I went to a local sporting goods store and bought different kinds of wrestling helmets and shoes. I sent them to inner-city church without leaving my name.
On Christmas Eve, I placed the envelope on the tree, the note inside telling Justin what I had done and that was his gift from me. His smile was the brightest thing about Christmas that year and since then the envelope has become the highlight of our Christmas.


B .
C .
D .
要求:①针对来信内容回复,可以适当发挥;
②回信的开头与结尾已给出,不计入总词数。
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Dear Judy, I'm glad to be your e-friend. My name is Helen. I'm from New York, the US. Can I ask you some questions? Where do you live? How old are you? What do you look like? What is your hobby? Which season (季节) is your favorite? Why do you like it? I have so many questions. But the most important is what your dream job is. My dream job is to be a pilot(飞行员)when I grow up. Please write to me soon. Yours, Helen |
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Dear Helen, I'm glad to be your e-friend too. Now Let me answer all your questions.
Hope to get your next email soon. Yours, Judy |