A：岩浆岩和沉积岩
B：岩浆岩和变质岩
C：沉积岩和变质岩
D：变质岩和沉积岩
“六一”前夕，某质监部门对儿童玩具市场进行了专项检查，发现个别种类玩具的材质易断裂，断裂后尖锐的边缘因受力面积____ ，对人体的压强____ ，容易刺伤孩子.
—It _____be him. He has gone to HongKong.
—Oh, Dale lost his watch.
