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【单选题】
下列哪个描述是三大营养定律--最小养分律的内容。
A.
作物产量受土壤中相对含量最小的养分所控制，作物产量的高低则随最小养分补充量的多少而变化。
B.
植物最初的营养物质是矿物质，而非腐殖质。
C.
植物以不同方式从土壤中吸收矿质养分，使土壤养分逐渐减少，连续种植会使土壤贫瘠，为了保持土壤肥力，就必须把植物带走的矿质养分和氮素以施肥的方式归还给土壤。
D.
土壤肥力取决于腐殖质含量，腐殖质是土壤中唯一的植物营养物质。矿物质可加速腐殖质的转化与溶解，使其变成植物可吸收的物质。
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举一反三
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A.
特解 (0,-1.8889,0.7778,0); 基础解系 (-1.2857,0.1429,1.0000,0),(0.5000,-0.5000,0,1.0000)
B.
特解 (-1.8889,0,0.7778,0); 基础解系 (-1.2857,0.1429,0,0),(0.5000,-0.5000,0,1.0000)
C.
特解 (0.5000,-0.5000,0,1.0000); 基础解系 (-1.2857,0.1429,1.0000,0),(0,-1.8889,0.7778,0)
D.
特解 (-1.2857,0.1429,1.0000,0); 基础解系 ,(0,-1.8889,0.7778,0), (0.5000,-0.5000,0,1.0000)
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【判断题】已知【图片】是齐次线性方程组【图片】的一个基础解系，那么【图片】也是该方程组的一个基础解系。
A.
正确
B.
错误
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Have gone to
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am going to
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was going to
D.
have been to
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【单选题】If you want the travel agency to help planning your trip, you can say .
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How long is the trip?
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What is the fair per head?
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I need help planning my vacation.
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货币性资产
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无形资产
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【单选题】Angelina saw her trip to Iraq significant because she could_____.
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help others know where the problems were
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help bring NGOs back to the region
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talk to different people there
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【简答题】阅读理解。 Tired? Bored? Hungry? And more miles left to go? Help pass the time on your trip: play a ! Everyone knows that a long bus ride can make even the most exciting field trip seem boring. When th...
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【单选题】—Would you help me plan a trip? —_________________
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You bet!         
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Yes, I can.    
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Not at all.
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【简答题】Plan on traveling around the USA this summer. If you need help in arranging the trip, or want ideas about where to go and what to do, there are a number of outstanding websites that can make your Amer...
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相关题目：
【单选题】下面哪一组向量是线性方程组【图片】的一个特解和对应齐次方程组的一组基础解系：
A.
特解 (0,-1.8889,0.7778,0); 基础解系 (-1.2857,0.1429,1.0000,0),(0.5000,-0.5000,0,1.0000)
B.
特解 (-1.8889,0,0.7778,0); 基础解系 (-1.2857,0.1429,0,0),(0.5000,-0.5000,0,1.0000)
C.
特解 (0.5000,-0.5000,0,1.0000); 基础解系 (-1.2857,0.1429,1.0000,0),(0,-1.8889,0.7778,0)
D.
特解 (-1.2857,0.1429,1.0000,0); 基础解系 ,(0,-1.8889,0.7778,0), (0.5000,-0.5000,0,1.0000)
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【单选题】cute the monkeys are when they ask for food!
A.
How                  
B.
What                
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What a
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【判断题】已知【图片】是齐次线性方程组【图片】的一个基础解系，那么【图片】也是该方程组的一个基础解系。
A.
正确
B.
错误
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【单选题】I _____ have a business trip to Hong Kong tomorrow. Can you help me prepare for it? [     ]
A.
Have gone to
B.
am going to
C.
was going to
D.
have been to
查看完整题目与答案
【单选题】If you want the travel agency to help planning your trip, you can say .
A.
How long is the trip?
B.
What is the fair per head?
C.
I need help planning my vacation.
查看完整题目与答案
【多选题】投资者投入的资产形式有（ ）
A.
货币性资产
B.
实务性资产
C.
无形资产
D.
商誉
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【单选题】Angelina saw her trip to Iraq significant because she could_____.
A.
help others know where the problems were
B.
help bring NGOs back to the region
C.
talk to different people there
D.
read the official papers
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【简答题】阅读理解。 Tired? Bored? Hungry? And more miles left to go? Help pass the time on your trip: play a ! Everyone knows that a long bus ride can make even the most exciting field trip seem boring. When th...
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【单选题】—Would you help me plan a trip? —_________________
A.
You bet!         
B.
Yes, I can.    
C.
Not at all.
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【简答题】Plan on traveling around the USA this summer. If you need help in arranging the trip, or want ideas about where to go and what to do, there are a number of outstanding websites that can make your Amer...
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