博奕的核心是（）
A.严格遵照规则
B.一定要有局中人
C.局中人在追求目标时要依赖其所掌握的资源
D.策略的运用
参考答案：D
The captain told the sailors to their sprits when they were on the point of giving up.
A．keep up
B．pick up
C．take on
D．go on
下列不属于合同保证保险的是
A．工程履约保证保险
B．工程投标保证保险
C．工程预付款保证保险
D．产品保证保险
