某品牌电热水壶的铭牌上标着如下表所示的数据。请计算: (1)当电热水壶装满水后,

题型:计算题

问题:

某品牌电热水壶的铭牌上标着如下表所示的数据。请计算:

(1)当电热水壶装满水后,从20℃加热到100℃,水吸收的热量;

(2)在额定电压下,要放出这些热量,电热水壶工作的时间。(不计热量损失)

热水壶容量2.0L
额定电压220V
加热时功率800W
频率50HZ

考点:热量的计算焦耳定律的变形公式的应用
题型:计算题

对结构复杂、施工难度大以及采用新工艺、新技术的工程项目,要进行专门性的研究,必要时组织专题会议,邀请()参加,制订切实可行的方案。

A.相关领导

B.相关部门

C.有经验的专业人员

题型:计算题

秦律规定,司法官员故意重罪轻判或轻罪重判,构成()。

A.“失刑”罪

B.“不直”罪

C.“纵囚”罪

D.“匿户”罪

题型:计算题

三相异步电动机能耗制动时,其定子绕组产生的磁场是()。

A.静止磁场

B.圆形旋转磁场

C.椭圆形旋转磁场

D.脉动磁场

题型:计算题

Boxing is a fist fighting sport between two matched combatants (对手) wearing padded gloves. A boxer’s primary aim is to land as many blows as possible to the head and torso (躯干) of the opponent, using strength and speed to dominate the contest. One of the oldest sports still practiced, boxing dates back to thousands of years ago. Today the sport is popular in many parts of the world and encompasses (包括) both amateur and professional matches.

For most of the 20th century boxing attracted huge fan and media attention in the United States. Some boxing champions became legendary, larger-than-life figures, such as Jack Dempsey, Joe Louis, and Muhammad Ali. Criticized to varying degrees throughout its history for its violent nature and high injury rate, boxing has somehow always managed to survive——and even thrive——as a sport.

Modern boxing regulations are based upon the 12 rules set out by British boxing officials in the mid-19th century. These rules became known as the Marquess of Queensberry Rules, named after the 8th Marquess of Queensberry, John Sholto Douglas, who sponsored and published them. In addition to in-the-ring rules, modern boxing also has specific regulations regarding eligibility for the fighters themselves.

The modern rules for professional and amateur boxing differ, but both types of contests are divided into time periods called rounds. In professional boxing, each round lasts three minutes; in amateur boxing, two minutes. A one-minute rest period between rounds is standard. Amateur contests consist of three rounds; professional contests may consist of up to 12 rounds. A bell is usually sounded by a timekeeper to begin and end each round.

A key step in making boxing safer and more respectable was the introduction of gloves, ending brutal bare-knuckle competition. Boxing gloves are heavily padded to soften the impact of the blow and to protect the hands of the boxer. As an added protection, the hands are taped before being placed in the gloves, which are essentially huge mittens. Professional gloves usually weigh between 170 and 226g; amateur gloves average 226 to 340g.

小题1:Which of the following is true according to the information in the passage?

A.Boxing is a violent sport with high injury rate.

B.People enjoy boxing because of its brutal nature.

C.Only professional players are allowed to attend boxing matches.

D.Boxing is a popular sport with a history of only 200 years.小题2:Boxing has always managed to survive as a sport. In the author’s opinion, __________.

A.this is because many people can participate in this popular sport

B.this is because boxing is a sport which can bring good business

C.the reason for this cannot be fully explained

D.this is because there are many legendary boxers小题3:Which of the following facts about boxing is NOT mentioned in the passage?

A.The time set for a round.

B.The weight of gloves.

C.The size of boxing rings.

D.The signal to begin and end each round.小题4:The author’s purpose in writing this passage is __________.

A.to give a general introduction to the sport of boxing

B.to advertise a band of boxing-related product

C.to discourage people from enjoying this violent sport

D.to get support for a sport with long tradition小题5:Which of the following statements can best describe the sport of boxing as a whole?

A.It is a brutal and violent sport, with little popularity in modern times.

B.It is a traditional sport, with little room for improvement.

C.It is a controversial sport, which nevertheless enjoys great public support.

D.It is strictly professional sport with rigid and exclusive rules.

题型:计算题

下列属于壮族自己的传统节日是()。

A.春节

B.端午节

C.中秋节

D.对歌节

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