我国食品卫生标准规定肉类中铅的安全限量标准为()。A.≤0.2mg/kg B.≤0.

题型:单项选择题

问题:

我国食品卫生标准规定肉类中铅的安全限量标准为()。

A.≤0.2mg/kg

B.≤0.5mg/kg

C.≤1.0mg/kg

D.≤1.5mg/kg

E.≤0.1mg/kg

考点:理化检验技术理化检验技术题库
题型:单项选择题

理性认识是对事物内部联系的反映,下列属于理性认识的有

A. 概念    B假说    C. 表象   D理论

题型:单项选择题

下列说法正确的是[ ]

11H、21H、31H为三种不同的核素 ②11H、21H、31H互为同位素

11H、21H、31H互为同素异形体 ④11H、21H、31H同系物

11H、21H、31H同分异构体 ⑥互为同位素的原子性质相同

⑦同位素的“同位”指核素的质子数相同,在元素周期表中占相同的位置

A、①②⑦

B、①②③⑥

C、①②⑥⑦

D、①②③⑥⑦

题型:单项选择题

Disease, poverty, hate, love-Charles Dickens' stories opened his readers' eyes to the most important themes of his age.Two hundred years on, his stories still speak volumes across the world, proving that Dickens' legacy (遗产) was far greater than just "great literature".

February 7 marks the 200th anniversary of the writer's birthday.To mark this date, BBC writer Alex Hudson listed six things Dickens gave the modern world.Let's take a look at two of them.

A while Christmas

Dickens is described as "the man who invented Christmas" -not the religious festival, but the cultural aspects that we associate with the festive (喜庆的) season today.

In the early 19th century, Christmas was barely worth mentioning, according to critic and writer Leigh Hunt.The committee which ran the Conservative Party even held ordinary business meetings on Christmas Day - unthinkable in the West nowadays, when everyone, but the most necessary workers takes at least three days off.

Many people believe that Dickens' popular depictions(描绘) of the festive period became a blueprint for generations to come.In his classic novel, A Christmas Carol, he not only put forward the idea of snow at Christmas,but also painted a picture of glowing warmth-“home enjoyments, affections and hopes".

In his biography of Dickens, Peter Ackroyd wrote, "Dickens can be said to have almost single-handedly created the modern idea of Christmas."

"Dickensian" poverty

Dickens was one of the first to take an honest look at the underclass and the poor of Victorian (the period during British Queen Victoria's reign from 1837 to 1901) London.

He helped popularize the term "red tape" to describe situations where people in power use needless amounts of bureaucracy (官僚作风) in a way that particularly hurts the weaker and poorer members of society.

"Dickensian" has now become a powerful word for describing an unacceptable level of poverty.In 2009, when the president of the Association of Teachers and Lecturers in the UK wanted to talk about deprivation in some areas, of Britain, she did not use words like "terrible" or "horrific", but rather described it as "life mirroring the times of Dickens".

小题1:What is the main idea of the article?

A.Charles Dickens' impact on the world.

B.An introduction to Charles Dickens' classic novels.

C.Charles Dickens' amazing characters.

D.Why Charles Dickens is popular across the world.小题2:Why is Dickens called "the man who invented Christmas"?

A.Because he created the religious festival.

B.Because one of his novels helped to shape Christmas celebrations.

C.Because many of his novels have something to do with Christmas.

D.Because he was the first man to have proposed celebrating Christmas.小题3:According to the article, the phrase “red tape” refers to __.

A.rules or procedures that are required to accomplish a task

B.a situation in which poor members of society are hurt

C.conflict between people in power and weaker people

D.pointlessly time-consuming official procedures小题4:What can we infer from the passage?

A.Dickens is still popular today in Britain.

B.everyone takes at least three days off at Christmas.

C.Dickens invented Christmas

D.Dickens gave the modern world six things.

题型:单项选择题

发病前有容量不足、体液丢失等病史,体检发现皮肤和黏膜干燥、低血压、颈静脉充盈不明显者,应首先考虑()。

A.慢性肾衰竭

B.肾前性少尿

C.肾后性尿路梗阻

D.急进性肾小球肾炎

E.急性间质性肾炎

题型:单项选择题

急性左心衰竭的特征是

A.肺动脉瓣第二心音亢进

B.舒张早期奔马律

C.心率慢

D.双肺满布湿罗音和哮鸣音

E.第一心音增强

更多题库