员工努力工作能够完成任务的信念强度，称为()。A.效价 B.动机 C.期望 D.工具

细胞膜上一般不含[ ]

A．胆固醇

B．磷脂

C．糖蛋白

D．血红蛋白

图所示三个规格相同的杯子里分别装有质量相等的水、盐水和煤油．（盐水的密度1.1×10³kg/m³，煤油的密度0.8×10³kg/m³ ）根据杯中液面的位置可以判定（　　）

A．甲杯是水，乙杯是盐水

B．甲杯是盐水，乙杯是煤油

C．乙杯是盐水，丙杯是水

D．乙杯是水，丙杯是煤油

 Lifeguard, sportscaster, movie star, governor, president——there wasn’t much Ronald Reagan didn’t do in life.

“The world was a vast opportunity for him,” Lou Cannon wrote in his biography（传记） of the former US president, who died on June 5，2004， aged 93.

Reagan’s final years saw him fight a losing battle against Alzheimer’s disease（老年痴呆症）. But his positive attitude toward life has given hope to many people.

Born in 1911 to a poor family in a small town in Illinois, his father was a failed salesman who drank too much. It was in these difficult times, though, that Reagan developed the powerful optimism（乐观） that would serve him so well. He always believed better times lying ahead, and this was reflected in his high school yearbook entry. “Life is one grand, sweet song, so start the music,” he wrote.

As a teenager, Reagan spent summers working as a lifeguard at a local beach, saving 77 lives in seven years. He graduated from college in 1932 with a degree in economics and sociology. But America was still in the middle of the Great Depression, and jobs were hard to find. Reagan finally found work as a radio sports announcer and this road led him to Hollywood in 1937.

During the 20---year film career, he never became a leading star. As in his lifeguard days, Reagan loved to play the hero and only took the role of a bad guy once in more than 50 films.

A talented speaker who was always able to connect with his audience, Reagan became involved in politics in the 1950s. This popular touch led to him being elected the governor of California in 1967.

All the while Reagan was in California, he had his eye on the White House. In 1980, aged 69, he became the oldest man ever elected president.

He held office from 1981 to 1989, the first president to serve two complete terms after World War Ⅱ. When he left, aged 77, he held the highest popularity rate of any retiring president in US history.

He remained positive even when he discovered he had an illness that would destroy him. “I will leave with the greatest love for this country of ours and eternal（永恒的optimism(乐观) for its future,”he wrote.

小题1:Reagan can be best described as a man with ______.

A．firmness

B．humour

C．optimism

D．talent小题2:What didn’t Reagan do in his life time?

A．Playing the role of a bad guy.

B．Being a leading star of the film.

C．Saving people’s lives.

D．Working as a radio sports announcer.小题3:Which is the correct order of events described in the passage?

a. Reagan fought a losing battle against Alzheimer’s disease.

b. Reagan became an actor.

c. Reagan worked as a lifeguard.

d. Reagan graduated from college.

e. Reagan was elected the governor of California.

A．a, c, d, e ,b

B．e, c, d, b, a

C．b, a, c, d, e

D．c, d, b, e, a小题4:When the writer of Reagan’s biography says “The world was a vast opportunity for him,” he really means that _______.

A．Reagan achieved much in his whole life

B．Reagan could have done much better

C．Reagan did much for America and the world

D．Reagan was a very lucky man

当电动执行机构的不灵敏区调得太小时，执行机构将出现（）。

A.实际位置与指令不符；

B.反转；

C.振荡。

位于市区的某房地产开发企业，2013年1月通过竞拍取得一宗土地使用权，支付地价款和相关税费合计2000万元，当年占用40%的土地面积用于开发写字楼。开发期间发生开发成本4000万元；发生利息费用200万元（全部为向某大型工业企业借款的利息支出）。10月，房地产开发公司将写字楼总建筑面积的1/2对外销售，签订销售合同，取得收入18000万元。已知当地政府规定房地产开发费用的计算扣除比例为最高限额比例。该房地产开发企业应缴纳的土地增值税为（）万元。

A.5350.5

B.6895.5

C.7009.5

D.8377.5