The Queen’s visit to China was largely（ ） . But it ended an unhappy chapter in the relationship.

A.synthetic B.representative C.international D.symbolic

Some crops are relatively high yielders and could be planted in preference to others to（ ）the food supply.

A.enhance B.curb C.disrupt D.heighten

Although the body is made up of many different tissues, these tissues are arranged in an（ ）and orderly fashion.

A.incredible B.intricate C.internal D.initial

The financial problem of this company is further（ ）by the rise in interest rates.

A.increased B.reinforced C.strengthened D.aggravated

Despite the poor weather conditions, the delivery people could not be deterred from their work.

A.outdone at B.summoned from C.kept from D.displaced at

Today these superstitious practices are no more, but their influence （ ）in the minds of many people.

A.carries on B.lingers on C.moves forward D.goes forward

新能源汽车与传统汽车的安全性是否存在差异

新媒体营销和传统营销有什么区别

从教育学未来的角度来定位教的有效性，最核心、最本质的定位是（）

下面，不是系统安全所包含的内容是______。

A.要保证操作系统不能崩溃

B.要保证系统中的账户不能被盗

C.要保证文件和目录存取权限设置的安全

D.要保证数据库系统的正常运行

设有一个 Student数据库，包括数据库，包括学生，课程，选修三个关系:三个关系:学生学生:S ( Sno ,Sname ,Ssex ,Sage,Sdept )
课程课程:C(Cno ,Cname ,Term,Credit )
选修选修:SC ( Sno ,Cno ,Score )
其中:学生关系S的属性分别表示:学号、姓名、性别、的属性分别表示:学号、姓名、性别、年龄、专业课程关系C的属性分别表示:课程号、课程名、的属性分别表示:课程号、课程名、开课学期、学分学分选修关系SC的属性分别表示:学号、课程号、分数
请用SQL语句完成下面的操作:
(1)、检索所有比"王华"年龄大的学生姓名、年龄和性别
(2)、检索选修了课程号为课程号为'CO2'课程的学生中成绩最高的学生的学号
(3)、检索选修了4门以上课程的学生学号和总成绩(不统计不及格的课程)，并要求按照总成绩的降序排列。(4)、检索张力同学没有选修的课程的课程号