等离子弧是借助水冷喷嘴对电弧拘束的，通常认为水冷喷嘴具有（）作用。A、机械压缩B、热

不宜采用塑化疗法的是（）

A.根尖孔尚未闭合的年轻恒牙

B.乳牙

C.根尖闭锁的前牙

D.A+B

E.A+B+C

D

The future of agriculture must achieve several goals at the same time.

First, it now appears that we will have to double world food production in the next 40 years due to population growth, increasing meat consumption and pressure from biofuels (生物燃料). We will also have to reduce the environmental impacts from our farming practices, which have caused widespread damage to soils, ecosystems, waters and even the atmosphere. In fact, agriculture’s impacts are as bad as climate change as an environmental concern. Besides, we will have to improve food security for the world’s poor. While the Green Revolution of the 1960s made it possible to feed hundreds of millions more people than in earlier eras, the number of the under-nourished in the world has started to rise again. Finally, we will have to increase the recovering ability of agriculture from shocks. Today, our high-efficiency, globalized world has many benefits, but it is vulnerable (易受伤的) to destruction, whether from droughts, diseases or sudden price rises. We must start building better food systems to better keep us away from future shocks.

Currently, there are two models of agriculture: local and organic agriculture vs. globalized and industrialized agriculture. Each has been strongly supported and severely criticized, but neither of these models, standing alone, can fully meet our needs.

Organic agriculture teaches us important lessons about soils, nutrition and pest management. Unfortunately, organic food provides less than 1% of the world’s calories, mostly to the wealthy. It is hard to imagine organic farming developing to feed 9 billion. Globalized and industrialized agriculture has benefits of high output and low labor demands. Without it, billions of people would have starved. However, it has come with enormous environmental and social costs, which cannot be sustained.

Rather than voting for just one solution, we need a third way to solve the crisis. Let’s take ideas from both sides, creating new, hybrid solutions that increase production, save resources and build a more sustainable agriculture.

There are many promising avenues to pursue. A new “third way” for agriculture is not only possible but also necessary. Our problems are huge, and they will require everyone at the table, working together toward solutions.

53. How many goals of agriculture are mentioned in the passage?

A. Three           B. Four            C. Five             D. Six

54. Which is true according to the passage?

A. Organic agriculture can feed most people in the world now.

B. Industrialized agriculture does no harm to our environment.

C. Modern farming is criticized while organic farming is not.

D. The future agriculture can’t only depend on organic agriculture.

55. We can learn from the passage that _______.

A. everyone can afford to enjoy organic food at will

B. we will vote to decide which farming system to take

C. the writer is quite optimistic about future agriculture

D. only experts can find a better agricultural solution

56. What’s the best title for the passage?

A. Organic Agriculture Vs. Industrialized Agriculture.          

B. The Goals of Future Agriculture and Its Way Out.      

C. A Third Possible and Necessary Way for Agriculture.

D. Modern Globalized and Industrialized Agriculture.

对文中划线的词语，解释准确的是( )。

A．“温室效应”：指地球气温急剧上升

B．“反馈调节”：指绿色植物的光合作用

C．“以上说法”：指对温室效应危害的异议

D．“他们”：指不同意生态学家意见的学者

金燕卡客户在发生挂失补卡、换卡等业务导致卡号变更的须重新申请办理金燕卡支付类业务。（）

案例：

某校高一（2）班，学生40人，教学内容：蹲踞式跳远。

教学目标：通过课堂教学，学生熟悉蹲踞式跳远的基本规则及动作技术。

教学步骤：

①上课。教师提问：蹲踞式跳远的要点，蹲踞式跳远分几个技术环节，如何让自己跳得更远？

②教师讲解规范姿势的重要性：一是为了维持身体的平衡；二是为落地做积极的准备。

③教师示范动作，学生观看并学习。

④分组练习蹲踞式跳远。

⑤教师巡视指导，纠正错误动作。

⑥集合进行集体讲评。

⑦小结，布置作业，宣布下课。

请根据材料指出该案例教学过程的优缺点。