— .
A:They are very big
B:They are smart
C:They are from Northeast China
D:I like them very much
涨潮时,牡蛎将壳张开进行取食,退潮时则将壳紧闭.这种行为属于( )
函数f(x)的图像如图所示,下列数值排序正确的是 ( )
写出近义词
等闲—____磅礴—____ 难—____ 暖—____