伺服系统包括伺服控制线路、功率放大线路、伺服电动机、机械传动机构和执行机构等，其主要功能是将数控装置产生的插补脉冲信号转换成机床执行机构的运动。
参考答案：对
阅读理解。
Linda and Mary are good friends. Linda is thirteen. She comes from the U.S.A. Mary is twelve. She’s from London(伦敦). They study in the same school, but in different classes. Linda’s father teaches English in a middle school. Her mother drives a car. Mary’s mother works in an office. Her father is a doctor. Linda can speak English, French(法语) and a little Chinese. Linda’s mother likes cooking. She likes eating rice. But Linda’ s father doesn’t. He likes drinking milk and eating bread. Mary’s mother doesn’t like cooking. But she likes doing some shopping. She can make nice skirts and dresses. Mary’s father likes doing housework(家务).
根据短文内容，回答下列问题。
1. Where does Mary come from?
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2. What does Linda’s father do?
3. Where does Mary’s father work?
4. What can Linda speak?
5. What does Mary’s mother do?
()是银行业金融机构对外合格授信的前提和基础。
A.对内适度授权
B.转授权
C.对内合理授权
D.权责一致
