A~G均为初中常见的物质,其中B是人体胃液中的一种酸,C是植物参与光合作用的气体

题型:推断题

问题:

A~G均为初中常见的物质,其中B是人体胃液中的一种酸,C是植物参与光合作用的气体之一,它们之间有如下图的相互转化关系(图中部分生成物已略去)。请回答下列问题:

(1)B是__________,C是___________, F是_______ ___。

(2)C物质在实际生活中的一种用途是 __ __________。

(3)写出化学反应的化学方程式:

A+B_______________________________________;

E+F_______________________________________;

G+C                                                                   

考点:物质的推断
题型:推断题

Have you ever thought, “I wish I could take a year off and just travel around the word?” Well, three lucky American teenagers were able to do just that. The teens — two males and one female — got an all-expenses paid, yearlong hike to five continents.

This trip didn’t include any five-star hotels or shopping funs. Eighteen-year-old Jamie Fiel from Keller, Texas, 17-year-old Arsen Ewing from Canyon, California, and 16-year-old Tyler Robinson from Lincoln, Massachusetts, didn’t expect fancy treatment. They signed up for the experience of a lifetime, which included hard work, often uncomfortable accommodations, and encounters with some of nature’s most dangerous animals and environments.

Jamie, Arsen, and Tyler were among hundreds of high school kids nominated by their science teachers to take this trip. Earthwatch Institute sponsored this adventure. Each year, Earthwatch employs thousands of volunteers worldwide to help with scientific research projects.

The group went all around the world to get a close look at the most pressing environmental issues of our time. Their assignments were as varied as their locations, and included measuring and attending pink flamingos in Kenya’s Great Rift Valley, and tracking giant sea turtles in Costa Rica.

As they worked with the Earthwatch scientists, Jamie, Arsen, and Tyler began to understand that we are at a critical moment in the life of our planet. Time for change is running out. As the teens went from country to country and witnessed different environmental dangers and challenges, they understood that solutions to important environmental issues start with the power of one person’s actions. They realized that each of them can make a difference.

小题1:These teenagers went on the journey around the world      .

A.to experience the most serous environmental problems on the earth

B.to bring the kindness of America to the other parts of the world

C.to go on sightseeing around the world

D.to call on more teenagers to join Earthwatch Institute小题2:What’s TRUE about their journey?

A. They had to pay for their journey on their own expense.

B, They often had to move from one hotel to another.

C. They had to take great pains to collect environmental information.

D. They received a warm welcome every time they arrived at a new place.

小题3:It can be inferred that Earthwatch Institute could be          .

A. an international university that takes in students from all over the world

B. a TV station that makes programmes on the beautiful scenery of the earth

C. a travel agency that organizes adventure trips specially for school children

题型:推断题

H.S编码子目号第四位与第五位数字间有一圆点,前四位数字表示该商品的 ( )。

A.子目号
B.品目号
C.章序号
D.顺序号

题型:推断题

天平室要经常敞开通风,以防室内过于潮湿。

题型:推断题

以下()货币,使用的是间接标价法。

A、人民币

B、英镑

C、日元

D、港元

题型:推断题

2012年10月,某跨国公司关闭其苏州工厂,将生产线向越南、柬埔寨等劳动力成本更低的国家转移,导致该厂与我国300多家代加工企业的合同被解除,这给我们的启示是()

A.经济全球化对我国的经济安全构成极大威胁

B.发达资本主义国家主导跨国公司投资的方向

C.企业应从代加工向自主创新、自创品牌转变

D.对外开放战略应由“引进来”转向“走出去”

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