研究材料储备的主要目的，在于寻求合理的储备量。储备过多会造成呆滞积压、占用资金过多；反之，储备过少会导致施工生产中断，停工待料，带来损失。
参考答案：对
完型填空
Most American families are smaller than the families in other countries.
Children in the USA will 1 their parents’ home when they grow up. They usually live far from their parents because they often go to different places to find good jobs. They often 2 to their parents or phone them, and they can choose their own 3 . Americans think it’s important for young people to make their own decisions.
Children are asked to do some house work at 4 . In many families, children are paid for 5 the housework so that they can learn how to manage their own money.
小题1:A. leave B. go C. love
小题2:A. come B. drive C. write
小题3:A. jobs B. job C. works
小题4:A. playground B. home C. classroom
小题5:A. to do B. do C. Doing
张三欲出远门旅行，将自己的名贵牧羊犬交托李四养护。某日，李四与犬散步，路遇长相怪异的王五，李四教唆牧羊犬攻击王五，却被王五在防卫时不小心踢死。后张三将李四诉至法院，王五作为第三人参加了诉讼。后原被告达成调解，李四在半年内向张三支付10000元，赵六同意为李四提供担保。王五不承担任何责任。下列哪一项说法是正确的( )
A．若王五拒绝签收调解书，不影响调解书的生效B．若赵六拒绝签收调解书，则调解书不会生效C．若赵六拒绝签收调解书，则调解书只在张三李四之间生效，不对赵六产生效力D．若赵六拒绝签收调解书，不影响调解书的生效，但赵六可以不承担担保责任
