问题 选择题

已知NH4CuSO3与足量2 mol/L的硫酸溶液混合微热,产生下列现象:①有红色金属生成,②产生刺激性气味的气体,③溶液呈现蓝色。据此判断下列说法正确的是 [ ]

A.反应中硫酸体现氧化性

B.NH4CuSO3中硫元素被氧化

C.1 mol NH4CuSO3完全反应转移0.5 mol电子

D.刺激性气味的气体是氨气

答案

答案:C

阅读理解

An election year is one in which all four numbers can be divided by four (1944, 1948, etc.). Since 1840, American presidents elected in years ending in zero have been noticed to die in office. William H. Harrison, the man who served the shortest term, died of a kind of deadly illness several weeks after he took office.

Abraham Lincoln was one of the four presidents who were murdered. He was elected in 1860, and his death came just five years later.

James A Garfield, a former Union Army general from Ohio, was shot during his first year in

office (1881) by a man to whom he wouldn't give a job.

While in his second term of office (1901), William McKinley, another Ohioan, attended the

Pan-American Exposition at Buffalo, New York. During the reception, he was killed while shaking hands with some of the guests.

Three years after election in 1920, Warren G. Harding died in office. Although it was never

proved, many believed he was poisoned.

Franklin D. Roosevelt had been elected four times (1932, 1936, 1940, and 1944), the only man to serve so long a term. He had suffered from poliomyelitis(小儿麻痹)in 1921 and died of the illness in 1945.

John F. Kennedy, the last of the line, was shot in 1963, only three years after his election.

67. Which of the following was an election year?

A. 1962                   B. 1928                      C.  1890                  D. 1846

68.          served the shortest term in office.

A. Abraham Lincoln               B. Warren G. Harding

C. William McKinley              D. William H. Harrison

69. Which of the following statements is true?

A. All presidents elected in years ending in zero have died in office.

B. Only presidents from Ohio have died in office.

C. Franklin D. Roosevelt completed four times as president.

D. President Abraham Lincoln died in the year of 1865

70. How many presidents elected in years ending in zero since 1840 have died in office?

A. 7             B. 6            C. 5            D. 4

判断题