下列哪一种动物的卵裂属于螺旋型卵裂？（）
A.海鞘的卵裂
B.鸟类的卵裂
C.软体动物的卵裂
D.两栖类的卵裂
参考答案：C
He sat on his bed looking at his brother, _______ had his arms crossed and looked angry.
A．that
B．whom
C．who
D．which
小王测量丁五个体积、质量各不相同的铝块，将所得数据描绘成图表。图中能与实验结果吻合的是 [ ]
A.
B.
C.
D.
