实施会员计划的主要目的是以销售会员卡为前提，通过软性权益和实际优惠增加顾客认可度，锁住针对人群，使会员不断消费我们的产品。
参考答案：对
未加校正的液压伺服系统有什么特点？
Comparative Historical Linguistics believed that all languages originated from one language and were ruled by a common ______.
