1molSO2和1molSO3具有相同的 ①分子数②原子数③ S原子数④O原子数

题型:选择题

问题:

1molSO2和1molSO3具有相同的

①分子数②原子数③ S原子数④O原子数  [ ]

A.①②

B.①③

C.①④

D.②④

考点:物质的量
题型:选择题

诊断急性脓胸最可靠的依据,是()

A.高热,胸痛

B.X线所见胸部致密影

C.白细胞升高

D.胸穿抽出脓液

E.抗生素治疗有效

题型:选择题

In the U.S. Mother’s Day is a holiday celebrated on second Sunday in May. It is a day when children honor their mothers with cards, gifts and flowers. First observance in Philadelphia in 1907,it is based on suggestions by Julia Ward Howe in 1872 and by Anna Jarvis in 1907.

Although it wasn’t celebrated in the U.S. until 1907,there were days honoring mothers even in the days of ancient Greece. In those days, however, it was Rhea, the Mother of the gods that was given honor. Later,in the 1600’s,in England there was an annual celebration called “Mothering Sunday.” It was celebrated during June, on the fourth Sunday ,the servants, who generally lived with their employers, were encouraged to return home and honor their mothers. It was traditional for them to bring a special cake along to celebrate the occasion.  

In the U.S., in 1907 Ana Jarvis, from Philadelphia, began a campaign to establish a national Mother’s Day. Jarvis persuaded her mother’s church in Grafton, West Virginia to celebrate Mother’s Day on the second anniversary of her mother’s death, the 2ed Sunday of May. The next day Mother’s Day was also celebrated in Philadelphia, Jarvis and others began a letter-writing campaign to ministers, businessmen, and politicians asking to establish a national Mother’s Day. They were successful. President Woodrow Wilson, in 1914,made the official announcement recognizing Mother’s Day as a national celebration that was to be held each year on the 2nd Sunday of May.

Many other countries of the world celebrate their own Mother’s Day at different times throughout the year. Denmark, Finland, Italy, Turkey, Australia, and Belgium celebrate Mother’s Day on the second Sunday in May, as in the U.S.

小题1:.Mother’s Day in the U.S. was first celebrated         .

A.in 1872

B.in 1907

C.in the 1600’s

D.in 1914小题2:The underlined word “observance” in the first paragraph probably means  “      ”.

A.celebration

B.principle

C.holiday

D.campaign小题3:According to the passage, which of the following is TRUE?

A.All the mothers were given honor in the days of ancient Greece.

B.Only the servants’ mothers were given honor on Mothering Sunday in England.

C.President Woodrow Wilson announced Mother’s Day as a national celebration.

D.Ana Javis’s mother probably died on the 2nd Sunday of May in 1907.小题4:What could be the best title for this passage?

A.Mother’s Day of the U.S

B.Mother’s Day of the world

C.Ana Jarvis and Mother’s Day

D.Styles of Mother’s Day

题型:选择题

GB/T11132《液体石油产品烃类测定法》规定,试样中含有大量沸点高于204℃的物质时,用()代替异丙醇会改善洗脱效果。

A.异戊烷

B.异丁烷

C.异戊醇

D.异丁醇

题型:选择题

传输设备时钟当外部定时基准中断时,SDH设备内部自由振荡时钟准确度应为()。

题型:选择题

运行表不包括()内容。

A.全部都不是

B.运行目的

C.运行表

D.运行步骤

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