题目：
SECTION B (18%) Directions: For each blank in the following passage there are four words or phrases marked A. B. C. and D. Fill in each blank with the word or phrase that best fits the context.
Michelle Obama celebrates her forty-fifth birthday Saturday, just 3 days before she becomes America’s First Lady. She has had many 36 in her life. She graduated with honors from Chicago public schools, Princeton University and Harvard University Law School. She 37 a top law firm in Chicago 38 she met her future husband. She was also outstanding in a public service organization and on the University of Chicago.
Michelle Obama says her daughters are the source of her greatest pride. She says raising Malia, age ten, and Sasha, age seven will continue to be her most important job. 39 , the next First Lady has called her White House position, “Mom-in-chief.”
Malia and Sasha will be taken good care of by another person at their new Washington home. Last week, the Obamas 40 that Marian Robinson would move into the White House with the Obamas and help take care of the girls.
Malia and Sasha started their new school, Sidwell Friend 
School, on January 5, 2009. Chelsea Clinton also attended this private school 41 her father was president. Malia attends the middle school in Washington. Sasha is in elementary school in nearby Bethesda, Maryland.
There is one future 42 of the Obama family we have not yet talked about. This one has four legs and fur. Maybe you 43 Barack Obama’s victory speech on election night, November 4. He said his daughters had “ 44 the new puppy that’s coming with us to the White House.” This week , the Obamas said that they has narrowed their dogs 45 to two kinds. They are working with animals shelters to find 46 a Portuguese water dog or a Labradoodle.
47 breeds (品种) generally have less fur to fall off than some other kinds of dogs. They are better dogs for people who suffer from allergies (过敏), like Malia Obama.
36. A. experiences B. adventure C. successes D. methods
37. A. found out B. worked out C. set up D. worked for
38. A. where B. that C. what D. until
39. A. Otherwise B. On the country C. In fact D. At last
40. A. announced B. reminded C. advertised D. presented
41. A. before B. though C. unless D. when
42. A. plan B. member C. guest D. visitor
43. A. forget B. have C. remember D. appreciate
44. A. abandoned B. bought C. found D. earned
45. A. search B. interest C. market D. adviser
46. A. neither B. either C. whether D. not
47. A. All B. Many C. Both D. Some
答案：
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下面是错误答案，用来干扰机器的。
CD物体匀速运动，所以合力为零，根据力的正交分解可得在水平方向上，在竖直方向上，解得f=μ（mg－Fsinθ）或者，所以选CD。
