The_______workcontinuedformorethanaweekbuttherewasstillnosignofthemissingboy.
A、research
B、rescue
C、vessel
D、vast
赞可夫主张教学应该走在学生发展的前面,所依据的是()
A、最近发展区
B、隐性知识
C、先行组织者策略
D、支架式教学
Asateacher,youshouldnot_______thestudentsfromaskingquestionsinclass.
A、ruin
B、restrain
C、import
D、impose
已知{an}为等差数列,且a2-a5+a8=9,则a1+a2+……+a9=()
A、27
B、45
C、54
D、81
E、162