旋转磁场磁选机,它的磁源为极性交替排列的永久磁铁,它绕线轴快速旋转,磁场强度的大小和方向()。
A.磁性变化
B.时间变化
C.速度变化
D.磁极变化
参考答案:B
Directions:This section consists of three groups of pairs listed in two columns, A and B. You are to match the one marked 1) ,2), 3 ) ,4) or 5) in Column A with the one marked a, b, c, d or e in Column B. One point is given to each pair you match. 1) ______ the Direct Method 2) ______ the Audiolingual Method 3) ______ the Oral Approach 4) ______ the Communicative Approach 5) ______ the Cognitive Approach a) cognitive psychology and transformational grammar b) Notional Syllabus or some other communicatively organized syllabus c) language acquisition and associationist psychology d) British "structuralism" e) structural linguistics
下列词语中有四个错别字,找出来,并改正在横线上。
滑嵇可笑 罂粟 惶恐不安 阔绰 人迹罕至 云宵
风流倜傥 臃肿 恣无忌惮 倘若 飞扬跋扈 振悚
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