问题 填空题

硬水会给生产生活带来许多不便。生活中可以通过煮沸来降低水的硬度。硬水在煮沸时发生的反应之一是:Ca(HCO3)2 =CaCO3↓+CO2↑+H2O,该反应所属反应类型是            。区别硬水和软水时,可用            来检验。

答案

(1)分解

(2)肥皂水

由题目所给信息可知,硬水在煮沸时发生的反应符合“一变多”的特点,故属于分解反应.鉴别硬水和软水一般用肥皂水,产生泡沫较多的是软水,较少的是硬水.

故答案为:分解反应;肥皂水

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Despite bankruptcies,lay off and tighter comsumers spending,a few femaleled  businesses in Japan are developing well.

Shizue Hamada,52,set up a business in 1991 with eight other housewives-to care for the elderly and the physically disabled.

It wasn’t long before the Tasukeai Yui(mutual -aid group) earned a reputation for    its excellent  service. It now employs 200  staff  and  has  300 million  yuan(US $2.4million)in annual sales.

The woman said their business has been successful because they provide what  customrs really want.

These entrepreneurs are making use of a revalized  and  healthy demand  for everyday basic items.

Bread,for instance,is  in  high demand.Business  woman  Meiko Tanaka,26,started selling high-quality bread over the Internet in 2000.“Bread is cheap,”she said.“We migh  as well eat the bread baked using the the highest-quality ingredients.”

Five women—former office workers in their late 20s—have started the“OL Food Bureau of Investigation”to review restaurants on the  Internet.OL means young    office lady. It’s  a common nickname in Japan.

Business is increasing rapidly.Membership for their online magazine has reached 26,000. Their non-professional comments  seem to carry a lot of weight with consumers.This month the five women will be appearing on Japanese TV.

What all these female entrepreneurs have in common is a strong belief in their  likes and dislikes,and confidence is their own sensibilities.

They find gaps in the market and fill them with products and services that they like or want.

Japanese women headed nearly 6 percent of all  businesses in Japan at the end of  June—up from 4.5 per cent in 1999.

These female—led micro—businesses are playing an increasingly large role in the economy by plugging the gap between supply and demand.

1.When talking about the businesswomen in Japan,the writer       

A.thinks little of them

B.thinks that they will take the place of men in future

C.sings the praises of  their abilities

D.is not sure of  their future development

2.The passage mainly discusses .      

A.Japanese women                        B.female-led businesses in Japan

C.how to earn a reputation                 D.Japanese economic development

3.The five women will be appearing on Japanese TV because         .

A.thier comments have great influences on consumers

B.they have set up the first online magazine

C.they have arranged handreds of jobs for laidoff workers

D.they used to work in offices and are fairly beautiful

4.If an old man in Japan can't live by himsilf,he should turn to        for hehp.

A.Tasukeai Yui  B.Meiko Tanaka   C.OL Food Bureau of lnvestigation   D.entrepreneurs