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【单选题】
下列关于生态农业的叙述正确的是 ( )A.
生态农业是以高投入来获得农作物的高产
B.
用作物秸秆培育食用菌，可实现能量的多级利用
C.
用家畜粪便作有机肥还田，运用了能量循环再生原理
D.
合理密植可以明显提高农田生态系统的抵抗力稳定性
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【简答题】Corrections should be done as follows: Wrong word: underline the wrong word and write the correct word in the blank. Extra word: delete the extra word with an “×.” Missing word: mark the position of t...
【单选题】关于粉体流动性，叙述正确的是
A.
粉体的流动性可用单一的指标来表示
B.
休止角是衡量粉体流动性的一个指标
C.
休止角越大，流动性越好
D.
粉体粒度越小，流动性越好
E.
粉体含水量越低，流动性越好
【简答题】这是改错题,不是填空题哈! Correct the errors in the following passage. The passage contains ten errors, one in each indicated line. In each case, only one word is involved. Answers should be given like this: is -...
【简答题】Not many 17-year-old girls know how to solder (焊) copper pipes together or light a pilot light. These are 1 I’ve learned as an assistant to my 2 in his plumbing (管道) business. My summer job deals with...
【简答题】衡量粉体流动性的指标为
【简答题】5 Cross out one word which is wrong. Write
the correct word at the end. ► I haven’t got central heating; I need a
plumber to repair a new system. install 1 Our estate agent made the arrangem...
【简答题】The plumber went down to the cellar to fix the _________ pipe. 2. There is a _________ between his two front teeth. 3. You will _________ your health if you smoke. 4. Her boss is giving her ____...
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