在常温下用惰性电极电解2 L饱和食盐水,电极上通过0.2 mol 电子时停止电解

题型:计算题

问题:

在常温下用惰性电极电解2 L饱和食盐水,电极上通过0.2 mol 电子时停止电解,此时电解生成的NaOH质量是多少?溶液的pH是多少?(溶液的体积变化忽略不计)

考点:电解池原理电解池电极反应式的书写
题型:计算题

《食品安全法》对食品生产经营者的义务和责任是怎样规定的?

题型:计算题

The composer Wolfgang Amadeus Mozart’s remarkable musical talent was apparent even before most children can sing a simple nursery rhyme. Wolfgang’s older sister Maria Anna (who the family called Nannerl) was learning the clavier, an early keyboard instrument, when her three-year-old brother took an interest in playing. As Nannerl later recalled, Wolfgang “often spent much time at the clavier picking out thirds (三度音), which he was always striking, and his pleasure showed that it sounded good.” Their father Leopold, an assistant concertmaster at the Salzburg Court, recognized his children’s unique gifts and soon devoted himself to their musical education.

Born in Salzburg, Austria, on January 27, 1756, Wolfgang had composed his first original work by age five. Leopold planned to take Nannerl and Wolfgang on tour to play before the European courts. Their first venture was to nearby Munich where the children played for Maximillian III Joseph, elector of Bavaria. Leopold soon set his sights on the capital of the Hapsburg Empire, Vienna. On their way to Vienna, the family stopped in Linz, where Wolfgang gave his first public concert. By this time, Wolfgang was not only a skilled harpsichord player, but he had also mastered the violin. The audience at Linz was amazed by the six-year-old, and word of his genius soon traveled to Vienna. In a much attended concert, the Mozart children appeared at the Schonbrunn Palace on October 13, 1762. They completely attracted the emperor and empress.

Following this success, Leopold received a lot of invitations for the children to play, for a fee. Leopold seized the opportunity and booked as many concerts as possible at courts throughout Europe. A concert could last three hours, and the children played at least two per a day. Today, Leopold might be considered the worst kind of stage parent, but at the time, it was not uncommon for prodigies to make extensive concert tours. Even so, it was an exhausting schedule for a child who was just past the age of needing an afternoon nap.

小题1:

A good title for this passage would be ________.

A.Classical Music in the Eighteenth Century: An Overview.

B.Stage Parents: A Historical Point of View.

C.Mozart: The Early Life of a Musical Genius.

D.Mozart: The Short Career of a Musical Genius.小题2:

What was the consequence of Wolfgang’s first public appearance?

A.He attracted the emperor and empress of Hapsburg.

B.Word of Wolfgang’s genius spread to the capital.

C.Leopold set his sights on Vienna.

D.Invitations for the miracle children to play poured in.小题3:

Each of the following statements about Wolfgang Mozart is directly supported by the passage except ________.

A.Mozart’s father made full use of his children’s talent

B.Maria Anna was also talented in music

C.Wolfgang’s childhood was devoted to his musical career

D.Wolfgang preferred the violin to other instruments小题4:

The word “prodigies” in the last paragraph probably means “________”.

A.unusually talented people

B.strict parents

C.greatest composers

D.generous people

题型:计算题

更换给水泵推力瓦块的最后刮研为什么必须在组合状态下进行?

题型:计算题

可引起低血钾的中成药是

A.含有盐酸麻黄碱的中成药

B.含有吲哚美辛的中成药

C.含有安乃近成分的中成药

D.含乙酰氨基酚成分的中成药

E.含有氢氯噻嗪的中成药

题型:计算题

下列哪种疾病常常与双侧多发的肾血管平滑肌脂肪瘤并存()

A.马蹄肾

B.肾脓肿

C.肾癌

D.多发性硬化

E.结节性硬化

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