(6.3－4.8)÷0.2－2.3=____

Tom asks, “Why does the moon move around the earth?” Perhaps he shows ____ (curious) about everything.

章鱼和乌贼____                       A线形动物

蚯蚓和沙蚕____                      B软体动物

蛔虫和丝虫____                      C节肢动物

螃蟹和蜘蛛____                      D环节动物

水螅和海葵____                      E扁形动物

猪带绦虫和涡虫____                 F腔肠动物