试题与答案

经过_________和_________作用,花发育成_________和种子

题型:填空题

题目:

经过_________和_________作用,花发育成_________和种子;____,____和____是植物体的生殖器官,_________和_________则标志着植物进入一生的成熟阶段。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:按照《混凝土结构工程施工质量验收规范》第7.3.3条,混凝土拌制前,应测定砂、石含水率并根据测试结果调整材料用量,提出施工配合比。设:水泥=1.0,砂子=1.94/(1-5%)=2.042,石子=3.76/(1-1...

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     When you see a famous car in the street, maybe you will say, "It's cool . " You may think, "He's so       cool,"when you see your favourite footballer.

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