单选题：According to the passage, what did the farmers have to do wi

题目内容：
According to the passage, what did the farmers have to do with the coming of mechaniza-tion of agriculture? A． Many of them had to leave their farmland for industrial center
B． They stuck to their farm wor
C． They refused to use machine
D． They did their best to learn how to use the machine
参考答案：
答案解析：

证券公司不可以在全国银行间债券市场上参加记账式国债的招标发行及竞争性定价过程，只能在证券交易所债券市场上参加。（　　）A

证券公司不可以在全国银行间债券市场上参加记账式国债的招标发行及竞争性定价过程，只能在证券交易所债券市场上参加。（　　）A．正确B．错误

分类：公共英语三级  题型：单选题
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取供试品0.10g，加无水乙醇5ml溶解后，加二苯胺试液1滴，用硫酸铈滴定液(0.01mol/L)滴定，不得超过1.0m

取供试品0.10g，加无水乙醇5ml溶解后，加二苯胺试液1滴，用硫酸铈滴定液(0.01mol/L)滴定，不得超过1.0ml

分类：公共英语三级  题型：单选题
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我国现在引起慢性肾功能不全的病因最常见的的是

我国现在引起慢性肾功能不全的病因最常见的的是

分类：公共英语三级  题型：单选题
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The underlined word "this" in the second paragraph refers to

The underlined word "this" in the second paragraph refers to the change that____

分类：公共英语三级  题型：单选题
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