题目内容

Many communities offer ______ for bicultural children to learn about their native culture together in a fun environment.

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The word conservation has a thrifty meaning. To conserve is to save and protect, to leave what we ourselves enjoy in such good condition as others (1) may also share the enjoyment. Our forefathers had no idea that human population would increase faster than the supplies of crude materials. Most of them, even (2) until very recently, have the foolish idea that the treasures were "limitless" and "inexhaustible". Most of the citizens of early generations knew little or (3) nothing about the complicated and the delicate system that runs all through the nature, which means that, as in a life body, an unhealthy condition of one part (4) will sooner or later be harmful to all others. (5) Fifty years ago nature study was not part of the school work. Scientific (6) forestry was a new idea; timber was still cheap at that time because it could be brought in any quantity from distant woodlands; soil destruction and river floods were not national problems; nobody had already studied long-term climate cycles (7) in relation with proper land use; even the word conservation had nothing of the (8) meaning that it has for us today. For the sake of ourselves and those who come after us, we must now set about (9) repairing the mistakes of our forefathers. Conservation should, however, be made (10) a part of everyone’s daily life. To know about the water table in the ground is just as important to us as a knowledge of the basic arithmetic formulas.

第(24)至(26)题基于“学生-选课-课程”数据库中的如下三个关系：学生基本信息：S(S#, SNAME,SEX,AGE) 选课信息：SC(S#, C#,GRADE) 课程信息：C(C#, CNAME, TEACHER) 若要求“查询某个学生的基本信息及其选课的平均成绩”，将使用关系

A. S和SC
B. SC和C
C. S和C
D. S、SC和C

针对“防抵赖”问题，可以通过______、身份认证和第三方确认等方法。

车辆在路边起步后应尽快提速，并向左迅速转向驶入正常行驶道路。

A. 对
B. 错