量反应（graded response）

1、已知关系：STUDENT(sno，sname，grade)，以下关于命令“C

已知关系：STUDENT(sno，sname，grade)，以下关于命令“CREATE CLUSTER INDEX s_index ON student(grade)”的描述中，正确的是A按成绩降序创建了一个聚簇索引B按成绩升序创...

2、Products are graded 

Products are graded according to size and （）. 

3、加速坡 accelerating grade

加速坡 accelerating grade

4、反应时间（reaction time/response time，简称RT）

反应时间（reaction time/response time，简称RT）

5、Tests provide grades, but they also le

Tests provide grades, but they also let you know what you need to spend more time（）and they help make your new knowledge permanent.Ato studyBstudyCstudiedDstudying

6、Grade No.1 rubber bales are mixed up（）

Grade No.1 rubber bales are mixed up（）grade No.4.AbyBfromCwithDagainst