单项选择题 Educators who study the influences of geographical differences on educational success have concluded that environment is not （） factor, as students in one country are no more （）than those in another.

单项选择题 People should not take good constitution for granted,for human genetic code is（）the development of （）

单项选择题 Griffith's early output was remarkably （）: it included not only the standard comedies, melodramas, westerns, and thrillers, but also such novelties as adaptations from Browning and Tennyson, and treatments of social issues.