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Ever since Picasso's paintings were on exhibition, there ______ large crowds at the museum
A. is
B. have been
C. has been
D. are being
【B20】
A. rich children
B. poor children
C. clever boys
D. pretty girls
“蓝色革命”作为一种现代农业技术革命,是指人类向水域索取食物的重大技术革命的统称。
下列行为与“蓝色革命”不符的是()。
美国法和英国法是普通法系的两个分支,二者的共同点是()。