“存款证明—个人存款类”和“存款证明专用章”必须贯彻（）原则。
A、章证分管
B、双人保管
C、有权人保管
D、会计主管保管
参考答案：A
老师要求编写四个定语从句的句子，小明把作业写在了电脑中，可电脑程序突然出现问题，小明写好的句子全乱了，他很着急，请你帮他把句子整理好。
1. Jim that I lost the key found yesterday.
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2. I who is know the man a model worker.
3. The I received yesterday letter that was from my parents.
4. This who saved is the doctor the boy’s life.
积温在农业生产中有哪些用途？
