A:why did you get it
B:when will you get it
C:where you got it
D:how will you get it
计算(﹣2x2y)3的结果是( )
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Some students spend ________ time on the Internet. They forget to study, eat and sleep. They can't even communicate with people in real life.
美国农业生产实现了地区生产的专业化, 其中 B 所在地区农业带的名称是____, 请分析 该 农 业 带 发 展 的 自 然 条 件:____。