水稻湿润育秧中,为什么强调培育壮秧?壮秧的形态与生理特征有哪些?

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问题:

水稻湿润育秧中,为什么强调培育壮秧?壮秧的形态与生理特征有哪些?

考点:作物栽培学各类作物栽培各类作物栽培题库
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根据BrodieX线头片观测显示,下述哪颗牙齿的位置最稳定()

A.上颌第一恒磨牙

B.下颌第一恒磨牙

C.上颌第二前磨牙

D.下颌第二恒磨牙

E.上颌第二恒磨牙

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自然灾害灾情的大小通常以人类社会和自然资源的损失为衡量标准,如人员伤亡、财产损失与环境破坏等。据此完成1~3题。

1、自然灾害造成的最严重的后果是[ ]

A、对人类生理、心理的损害

B、财产损失

C、自然资源与环境破坏

D、停工停产、交通通信中断

2、某一自然灾害的灾情指标有受灾面积、成灾面积、绝收面积、减产面积、经济损失等。该自然灾害可 能是①干旱②洪涝③地震④风暴潮 [ ]

A、①②

B、③④

C、①③

D、②④

3、不同的自然灾害各有其一定的受灾者,下列叙述正确的是 [ ]

A、干旱的主要受灾对象为农作物及农田

B、地震的主要受灾对象为农作物及农田

C、风暴潮的主要逐灾对象是工程建筑

D、洪水的主要受灾对象是工程建筑

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Directions: There are 4 passages in this part. Each of the passages is followed by 5 ques tions or unfinished statements. For each of them there are 4 choices marked A, B, C and D.
Passage One

People in the mass advertising business and others who study American society have been very interested in the question: What does the American consumer like Max Lerner, a well-known scholar who has studied American society, has said that American consumers are particularly fond of three things: comfort, cleanliness, and novelty.
Lerner believes that the American love of comfort perhaps goes back to the frontier experience, where life was tough and there were very few comforts. This experience may have created a p desire in the pioneers and their children for goods that would make life more comfortable. Today, the American’s love of comfort is seen in the way they furnish their homes, design their cars, and travel. How Americans choose a new mattress for their bed is an example of the Americans love of comfort. Many Americans will go to a store where beds are set up, and they will lie down on several mattresses to see which one is the most comfortable.
Cleanliness is also highly valued by Americans. There is a p emphasis on keeping all parts of the body clean, and Americans see lots of TV commercials for soap, shampoo, deodorants, and mouthwash: Perhaps the Puritan (清教徒的) heritage has played some role in the desire for cleanliness. The Puritans, a strict Protestant (新教的) church group who were among the first settlers of America, stressed the need to cleanse the body of dirt and of all evil tendencies, such as sexual desire. The saying "Cleanliness is next to Godliness" reflects the belief of most Americans that it is important to keep not only their bodies, but also their clothes, their houses, their cars, and even their pets clean and smelling good. Indeed, many Americans are offended by anyone who does not follow their accepted standards of cleanliness.
Along with cleanliness and comfort, Americans love having things that are new and different. Perhaps this love of novelty comes from their pride in their inventiveness. American have always been interested in inventing new products and improving old ones. They like to see changes in cars, clothing, and products for the home. Advertisements encourage people to get rid of old products and try new ones, whether the old ones still work or not. And if they cannot afford to buy something now, advertisers encourage consumers to charge it on a credit card. "Buy now— pay later. "

The American love of comfort originated from ______.

A.the Americans’ great pride in their abundant natural resources

B.the early settlers’ belief in hard work

C.the pioneers’ p desire to make life more comfortable

D.the pioneers’ ignorance of frugality and conservation

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Are you a man or a mouse When people ask this question they want to know (1) you think you are a (2) person or a coward. But you will never really know the answer to this question (3) you are tested in real life. Some people (4) they are brave but when they come face to face with real (5) , they act like cowards. Others think of themselves as cowards, but when they meet danger, they act like (6) .Lenny had always thought of himself as a (7) person. He got worried before examinations. He worried about his job and health. All he wanted in life was to be safe and healthy. (8) , on January 15th, 2002, a plane crashed into the Potomac River in Washington. Lenny went to the river to See what was happening. He saw a woman in the (9) water. Lenny did not feel afraid. He kept very (10) and did a very dangerous thing. He jumped into the Potomac, (11) to the woman, and kept her head (12) the water. Seventy-eight people died that day. Thanks to Lenny, it was not (13) .When you are in a very (14) situation and feel afraid, the body automatically produces a chemical in the blood. The chemical is called adrenalin. (15) adrenalin in the blood system, you actually feel per and per and are (16) to fight or run away. However, when you are absolutely terrified, the body can produce too much adrenalin. Where this (17) , the muscles become very hard and you find you (18) move at all. You are then paralyzed with fear. This is (19) when we are very frightened, we sometimes say we’re "petrified". This word comes from the Greek word "petros", which means "stone". We are (20) frightened that we become stonelike.

第(8)空应选择()

A.So

B.Therefore

C.Then

D.Actually

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中国人对别人表示友好的最基本方式之一,就是好好请他大吃一顿。唯有如此才能体现出自己的热情、友好和诚心。而西方人感兴趣的不是吃喝本身,而是吃喝过程中亲切、温馨的气氛,以谈话交流为主。这反映出

①地域文化都是在本地域独立形成,各具特色

②人们的社会行为折射出他们的文化生活 

③文化决定人们的实践活动和思维方式 

④各具特色的民族文化使世界文化异彩纷呈

A.①②

B.②④

C.①③

D.③④

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