问题 解答题

在血液成分中,血小板的作用是止血和凝血.______(判断对错)

答案

血液的成分包括血浆和血细胞.血细胞包括红细胞、白细胞和血小板.红细胞中富含血红蛋白,血红蛋白在氧含量高的地方与氧结合,在氧含量低的地方与氧分离,可见红细胞具有携带氧的功能;白细胞能够变形穿透毛细血管壁,吞噬细菌,对人体具有防御功能;血小板能够堵塞伤口,其中还含有促进血液凝固的物质,起止血和加速凝血的作用.

故答案为:A

单项选择题 A1型题
阅读理解

A heartless thief is believed to have crashed a fund-raiser and made off with a bag of cash meant to help a New York City firefighter pay for life-changing surgery for his 9-year-old son. But little Aidan Sullivan -- who was born with a facial defect and no right ear -- yesterday put up a brave front, with a message for the crook(thief): "I'm going to kick your butt!"

"I want to look normal," said Aidan, whose father, Tim, is a firefighter in the Bronx. The third-grader has hemi facial micro soma, in which one half of the face doesn't develop correctly.

Last weekend, family friend Peter Drake, a Ridgefield, Conn., firefighter, hosted a fund-raiser, collecting between $8,000 and $9,000. But when the party at a Danbury, Conn., Irish cultural center was over, the money had disappeared.

"At the end of the night, all the money that was donated was put in a zippered bag," said Tim Sullivan. "A bartender gave the bag to Pete... He had it in his hands. He put it down to go do something, and when he came back, he saw that it was missing."

Sullivan said his longtime friend -- who has had fund-raisers to pay for Aidan's 10 previous surgeries -- is "devastated."

"Pete was so upset. He kept saying, 'I let Aidan down, I let Aidan down,” Colleen Sullivan, 40, recalled.

"We even went Dumpster diving, in case it was thrown out."

The Sullivans plan to go ahead with the March 1 surgery led by specialists at NYU's Langone Medical Center in Manhattan. The money would have offset the $10,000 to $15,000 that insurance doesn't cover. Yesterday, Aidan said he's not a fan of hospitals and doesn't like to be away from his sister, Kaylee, 4. But he's willing to do it. "I'm excited," he said. "Finally, an ear."

小题1: Where do you probably read this text from?

A.A magazine.

B.A newspaper.

C.A book.

D.An advertisement.小题2: How did little Aidan Sullivan feel when he knew the money was missing.

A.He felt excited.

B.He felt surprised.

C.He felt upset.

D.He felt annoyed.小题3:What is the money used for according to this text?

A.To help Aidan Sullivan to have another operation.

B.To help pay for Aidan Sullivan’s life insurance.

C.To return the money the Sullivans owed to the hospital.

D.To help a firefighter who got hurt in the ear.小题4: What is true of little Aidan Sullivan?

A.He hates going to hospital.

B.He will go to New York for the surgery.

C.He didn’t care too much about the lost money.

D.He has received 10 surgeries before.小题5: What can we infer about Pete from the text?

A.He was heartless.

B.He was kind.

C.He was caress.

D.He was a firefighter.