He acted___he had never lived in England beforeA.as though B.like C.as D.even if

He acted___he had never lived in England beforeA.as though B.like C.as D.even if He acted___he had never lived in England beforeA.as though B.like C.as D.even if 答案为什么是a 而不是C He-Ne激光器 价格 He he ni ne 是什么 he-ne激光器频率多少 He-Ne的波长是多少? He Ne Ar 哪个稳定 叙述He-Ne激光器的工作原理 He-Ne激光的波长是多少? he-ne激光的标准波长是多少 设计获得He-Ne激光器激光光谱的方法 影响He-Ne激光器输出功率的主要因素有哪些 he-ne激光器波长0.6328对应光斑的大小是多少? 全息投影实验为什么用He-Ne激光器? I asked john to help ne,but he r___. 1.Although born in the Midwest,Langston Hughes lived most of his adult life in Harlem,in New York City,where,like other writers in the 1930's,he had wrote some of his finest works.NE.这里的had wrote 应该是wrote,但是like也应该是错误的 last night he had to () ()（）　because he had () () () he had almost e forgotten what he had done