Because of the thick smog, many people move to Sanys in Hainan, believing it would be a wonderful place to ____in.
A. live
B. living
C. be living
D. be lived
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Nowadays the English majors are ______ girls,though there are some boys.
A. most
B. much
C. mostly
D. many
试述达尔文的自然选择学说的内容.(每一要点要求适当展开或举例说明)
光的反射定律表明光线射到物体的表面会发生反射,反射光线在入射光线和法线决定的________,反射角等于入射角.