law of universal gravitation.
A. when
B. which
C. that
D. where
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以下有关神经系统机能的叙述，错误的是()。
A. 是动物机体唯一的机能调节系统
B. 有接收贮存、分析综合、处理发送信息的功能
C. 中枢神经系统调节机体活动的基本方式是反射
D. 能迅速对体内外各种环境变化作出适应性调节
A higher crime rate exists in cities _____ a large percentage of unemployment.
A. where have
B. that have
C. which they have
D. that having
Writers can accurately describe objects ______ have never seen.
A. who
B. if they
C. they
D. that
I’ve got a bottle of beer, but I haven’t got anything _____ I can open it with.
A. that
B. what
C. where
D. which
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