(2分)锌是人体生长发育不可缺少的微量元素。葡萄糖酸锌(化学式为C12H22O1

题型:计算题

问题:

(2分)锌是人体生长发育不可缺少的微量元素。葡萄糖酸锌(化学式为C12H22O14Zn,相对分子质量为455)是一种常用的补锌剂。请回答下列问题:

(1)葡萄糖酸锌由________种元素组成。

(2)葡萄糖酸锌中所含锌元素的质量分数为________(不要求写出计算过程,结果精确到0.1%)。

考点:物质组成元素的质量比化学式的写法和意义物质组成元素的质量分数化合价的求法
题型:计算题

The earthquake in Yushu _______ roughly one month before the second anniversary of the earthquake in Wenchuan.

A.was happened

B.had happened

C.happened

D.had been happened

题型:计算题

相同质量的Mg、Fe分别与足量的稀盐酸作用,产生H2的质量m(H2)与加入稀盐酸的体积V(稀盐酸)关系如图所示,其中正确的是( )

A.

B.

C.

D.

题型:计算题

In the UK, a group of campaigners(活动家)have declared the last Saturday in November as National Buy Nothing Day. “Our message is clear: shop less, live more!” says organizer Michael Smith. “The challenge is to try simple living for a day. Spend time with family and friends, rather than spending money on them. Anyone can take part, provided they spend a day without spending.”

On Buy Nothing Day, they take to the streets to tackle consumers(消费者). They dress as pigs to symbolize greed(贪婪). They offer to cut up credit cards and hand out shopping bags with the words “another useless thing I don’t need” written on the side. Some hold street parties to show shoppers that it is possible to have fun without spending money. Others go into shops and put notes saying “don’t buy me” inside clothes and shoes.

Some protestors(抗议者) are working against powerful forces. Many retailers(零售商) and manufacturers depend on Christmas sales for most of their profits. Around two thirds of GDP in the West is made up of consumer spending. If this drops, many people will lose their jobs. At least that will make it easier for them to buy nothing.

And there is also the risk that the campaigners will be seen as killjoys, who want to stop people enjoying themselves. “There’s a fun side to this,” says Michael Smith. “To some it’s a protest, but it’s also a street party. We’re not saying that people are bad because they go shopping, but we need get the message across for people to consume wisely. And after we’re finished, we’ll probably go for a drink.”

小题1:Why do a group of people in the UK choose Saturday as National Buy Nothing Day?

A.Because they have enough food at their homes.

B.Because it is the season for shopping.

C.Because they have run out of money at that time.

D.Because it’s popular to live a simple life.小题2:In order to persuade people to stop shopping, the campaigners _____.

A.stop people going out

B.have different ways to make it

C.offer goods to people freely

D.play tricks on consumers小题3:The underlined word “killjoys” in the last paragraph refers to people who _____.

A.ruin the happiness and fun of others

B.get money from shopkeepers

C.bring happiness to others

D.take no interest in shopping小题4:The campaigners started National Buy Nothing Day for the purpose of _____.

A.persuading people to kill time in a different way

B.persuading people to save money

C.persuading people to have more parties

D.persuading people to spend money wisely

题型:计算题

关于项目目标的风险影响等级的表述中,正确的有( )。

A.如果成本增加不明显,可以把风险对项目的影响定为低

B.如果进度拖延小于5%,可以把风险对项目的影响定为中等

C.如果进度拖延介于10%~20%,可以把风险对项目的影响定为高

D.如果只有少数工作受到影响,可以把风险对项目的影响定为很低

E.如果成本增加大于40%,可以把风险对项目的影响定为很高

题型:计算题

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