问题 选择题

已知氧化性Fe3+>Cu2+.现将铜粉放入稀盐酸中,微热后无明显现象发生;当加入下列物质后,铜粉的质量减少.则加入的物质不可能是(  )

A.FeSO4

B.Fe2(SO43

C.KNO3

D.HNO3

答案

A.Cu与盐酸、硫酸亚铁均不反应,Cu的质量不会减少,则不可能为硫酸亚铁,故A选;

B.Cu能与硫酸铁反应生成硫酸亚铁和硫酸铜,Cu的质量减少,故B不选;

C.硝酸钾在酸性条件下具有硝酸的强氧化性,与Cu发生氧化还原反应,Cu的质量减少,故C不选;

D.Cu与硝酸发生氧化还原反应,Cu的质量减少,故D不选;

选择题
阅读理解

The United States is one of the few countries in the world that has an official day on which fathers are honored by their children. On the third Sunday in June, fathers all across the United States are given presents, treated to dinner or otherwise made to feel special.

However, the idea for creating a day for children to honor their fathers began in Spokane, Washington. A woman by the name of Sonora Smart Dodd thought of the idea for Father’s Day while listening to a Mother’s Day sermon① in 1909. Having been raised by her father, Henry Jackson Smart, after her mother died, Sonora wanted her father to know how special he was to her. It was her father that made all the parental sacrifices② and was, in the eyes of his daughter, a selfless and loving man. Sonora’s father was born in June, so she chose to hold the first Father’s Day celebration in Spikane, Washington on the 19th of June, 1910.

In 1924 President Calvin Coolidge declared the third Sunday in June as Father’s Day. Roses are the Father’s Day flowers: red to be worn for a living father and white if the father has died.

When children can’t visit their fathers or take them out to dinner, they send a greeting card. Traditionally, fathers prefer greeting cards that are not too sentimental③. Most greeting cards are too special so fathers laugh when they open them. Some give heartfelt thanks for being there whenever the child needed Dad.

Notes:

① sermon  v. 布道

② sacrifices  n. 牺牲

③ sentimental  adj. 感伤的

1. The United States is special in Father’s Day because ______.

A. many people celebrate the day                B. only America celebrates the day

C. America makes it an official day              D. all men are honored in America

2. At first, Father’s Day was fixed on June 19th because ______.

A. Sonora honored her father on her father’s birthday

B. Sonora’s birthday was June 19

C. it was decided by the president at that time

D. her mother died on June 19

3. How many years has passed before Father’s Day became an official day since the father’s day was celebrated?

A. 4     B. 10      C. 14     D. 24

4. According to the passage, on Father’s Day,  ______.

A. people will wear the same flowers to honor their fathers

B. only daughters wear red flowers to honor their fathers

C. children must go home to honor their fathers

D. fathers are often honored in different ways

5. According to the passage, we can infer that Henry Jackson Smart ______.

A. was very kind to anyone

B. did a lot for his daughter

C. was the first father honored in 1924

D. always help others by giving money