题型:问答题 简答题 教室中上课,有时黑板反射的光能“晃”着一些同学的眼睛,看不清黑板上的字.出现晃眼现象的原因是( )A.只有黑板反射光,字不反射光B.字和黑板都反射光,字反射进入眼睛的光较强C.只有字反射光,黑板不反射光D.字和黑板都反射光,黑板反射进入眼睛的光较强 查看答案
题型:问答题 简答题 John shut everybody out of the kitchen _____ he could prepare his grand surprise for the party.[ ]A. which B. when C. as if D. so that 查看答案