行动性研究方法有五个循环阶段,正确的顺序是()。①资料收集②资料分析③评估反馈④方案实施⑤计划制定
A、①②⑤④③
B.①②③⑤④
C.①②③④⑤
D.②③①⑤④
参考答案:A
下列有机物的命名中,正确的是 [ ]
A.2-乙基丁烷
B.3-甲基戊烷
C.3-甲基-2-丁烯
D.二甲基苯
The clock has just _________ twelve. All the teachers should stop _________ and let the students have a rest.
A.hit; to teach
B.beaten; teaching
C.struck; teaching
D.knocked; to teach