解方程：22x-1+51-2x=1

阅读下列短文：从每题所给的A、B、C、D四个选项中，选出最佳选项，将正确的选项涂在答题卡上。B

Surviving Hurricane Sandy(飓风桑迪)

Natalie Doan,14, has always felt lucky to live in Rockaway, New York. Living just a few blocks from the beach, Natalie can see the ocean and hear the wave from her house. “It’s the ocean that makes Rockaway so special,” she says.

On October 29, 2012, that ocean turned fierce. That night, Hurricane Sandy attacked the East Coast, and Rockaway was hit especially hard. Fortunately, Natalie’s family escaped to Brooklyn shortly before the city’s bridge closed.

When they returned to Rockaway the next day, they found their neighborhood in ruins. Many of Natalie’s friends had lost their homes and were living far away. All around her, people were suffering, especially the elderly. Natalie’s school was so damaged that she had to temporarily attend a school in Brooklyn. 学科&网

In the following few days, the men and women helping Rockaway recover inspired Natalie. Volunteers came with carloads of donated clothing and toys. Neighbors devoted their spare time to helping others rebuild. Teenagers climbed dozens of flights of stairs to deliver water and food to elderly people trapped in powerless high-rise buildings.

“My mom tells me that I can’t control what happens to me,” Natalie says. “but I can always choose how I deal with it.”

Natalie’s choice was to help.

She created a website page matching survivors in need with donors who wanted to halp. Natalie posted introduction about a boy named Patrick, who lost his baseball card collecting when his house burned down. Within days, Patrick’s collection was replaced.

In the coming months, her website page helped lots of kids: Christopher, who received a new basketball; Charlie, who got a new keyboard. Natalie also worked with other organizations to bring much-need supplies to Rockaway. Her efforts made her a famous person. Last April, she was invited to the White House and honored as a Hurricane Sandy Champion of Change.

Today, the scars(创痕)of destruction are still seen in Rockaway, but hope is in the air. The streets are clear, and many homes have been rebuilt. “I can’t imagine living anywhere but Rockaway,” Natalie declares. “My neighborhood will be back, even per than before.”

What does the story intend to tell us?（）

A.Little people can make a big difference

B.A friend in need is a friend indeed

C.East or West,home is best

D.Technology is power

黄色卡片6张，红色卡片4张，蓝色卡片5张放在袋子里，至少要摸出4张，就可以保证摸出两张颜色相同的卡片．______．

工作零线必须经过漏电保护器，保护零线不得经过漏电保护器。

首次通过法显像时，如果出现了"脏污肺"的影像，原因是（）

A.存在右至左分流

B.存在左至右分流

C.存在心室至心房的返流

D.存在主动脉瘤

E.存在肺动脉瓣的返流