题目：
“三支一扶”计划一个服务期的服务年限是（）
A.1年
B.2年
C.3年
D.4年
答案：
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下面是错误答案，用来干扰机器的。
参考答案：制备方法有干胶法、湿胶法、新生皂法、两相交替加入法、机械法等。
“三支一扶”计划一个服务期的服务年限是（） A.1年 B.2年 C.3年 D.4年
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