— Hi,Jack!I'm just going to the practice for the concert.Are you coming to play your violin?
—____________,Carl.I have to finish my report today.
A.You'd better notB.It doesn't matter
C.I'm afraid notD.Don't worry
下列生物都生活在水中,其中属于鱼类的一组是
下列哪些不是动物的特征()
地球上种类和数量最多的动物类群是()
下列各项中不属于动物行为的是
细菌的哪些特点和它们的分布广泛有关()