(9分)如图所示,A、B两个木块质量分别为2 kg与0.9 kg,A、B与水平地

题型:计算题

问题:

(9分)如图所示,A、B两个木块质量分别为2 kg与0.9 kg,A、B与水平地面间接触光滑,上表面粗糙,质量为0.1 kg的铁块以10 m/s的速度从A的左端向右滑动,最后铁块与B的共同速度大小为0.5 m/s,求:

①A的最终速度;

②铁块刚滑上B时铁块的速度.

考点:动量守恒定律
题型:计算题

女,72岁,上腹不适,结合图像,最可能的诊断为()

A.球部憩室

B.球部溃疡

C.降段憩室

D.降段占位

E.水平段憩室

题型:计算题

第三部分:阅读理解(共15小题,每小题2分,满分30分)

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,并在答题卡上将该项涂黑。

Having returned from her round trip, the angry woman stood outside the ticket office of the station. “The railway owes me $ 12,” she said to Harry Jenks, the young man working at the office, “you sold me a ticket for May 22nd, but there was no ship from Jersey that night. So my daughter and I had to stay in a hotel. It cost me $12.”

Harry was worried. He remembered selling the woman a return ticket. “Come into the office, Madam,” he said politely. “I’ll just check the Jersey timetable for Mary 22nd.” The woman and her little girl followed him inside. She was quite right, as Harry soon discovered. There was no sailing on May 22nd. How could he have made such a careless mistake? He shouldn’t have sold her a ticket for that day. Wondering what to do, he smiled at the child. “You look sunburned,” he said to her. “Did you have a nice holiday in Jersey?”

“Yes,” she answered, shyly. “The beach was lovely. And I can swim too!” “That’s fine,” said Harry. “My little girl can’t swim a bit yet. Of course, she’s only three…”

“I’m four,” the child said proudly. “I’ll be four and a half.”

Harry turned to the mother. “I remember your ticket, Madam.” he said. “But you didn’t get one for your daughter, did you?” “Err. Well--,” the woman looked at the child. “I mean, she hasn’t started school yet. She’s only four.”

“A four-year-old child must have a ticket, Madam. A child’s return ticket to Jersey costs…, let me see…$ 13. So if the railway pays your hotel, you will owe(欠) $ 1.50. The law is the law, but since the fault was mine…”

The woman stood up, took the child’s hand and left the office.

56. The woman was angry because__________.

A. she couldn’t use the ticket for her round trip

B. she spent more money than she had expected

C. she had to return home a day earlier than she had planned

D. Harry had sold her a ticket to Jersey where there was no sailing

57. Harry was worried because________.

A. the woman was angry with him               B. he had not done his work properly

C. the Jersey timetable(时间表) was wrong        D. the little girl didn’t have a return ticket

58. Harry started talking to the little girl_________.

A. because he was in difficulty and didn’t know what to do

B. because he had a little girl about the same age as this girl

C. because he wanted to be friendly to the little girl who looked so nice

D. when she suddenly realized that he could find a way out from the little girl

59. When Harry said, “The law is the law, but since the fault was mine…”he meant that________.

A. they must follow it without choice, even though the fault was his

B. he had to be strict with the woman because of the law, although he didn’t want to

C. the woman had to pay him $1.50 and the railway would pay her for the hotel

D. she should pay $ 1.50, but he had made a mistake, she could go without paying

60. The woman left the office without saying anything because________.

A. she wanted to go home and get money for the child’s ticket

B. she was so angry that she didn’t want to have anything more to do with the young man

C. she was moved by Harry’s kindness

D. she knew she would have to pay the railway if she insisted(坚持)

题型:计算题

取样的原则是()

A.具有一定的数量

B.有效期内取样

C.均匀合理

D.不能被污染

E.包装不能破损

题型:计算题

针对红细胞的自身免疫疾病是()。

A.过敏反应

B.贫血

C.糖尿病

D.风湿性关节炎

题型:计算题

下列具体举措中,属于优化政府组织结构的内容的是()。

A.完善行政组织和行政程序法律制度

B.深化行政体制改革,理顺部门职责关系

C.创新行政管理方式,完善政府绩效管理

D.推进各级政府事权规范化、法律化

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