1、 问题:Airports can be classified into the following types: _.
选项:
A:A. commercial airport
B: B. military airport
C:C. general airport
D: D. All above
答案: 【 D. All above】 点我阅读全文
1、 问题:When red and green are used together in a composition, they are referred to as being _____.
选项:
A:unbalanced
B:dull
C:complementary
D:gloomy
答案: 【complementary】 点我阅读全文