用光学显微镜观察物质,若物体放大100倍,这里“100”倍是指物体的( ) A.体积 B.表面积 C.像的面积 D.长度或宽度 答案:D3.听第七段材料,完成第8至10小题.8.Where will the two speakers go for the picnic?A.In James'house.B.In the mountain.C.In the park.9.How will the two speakers go there?A.By bike.B.By boat.C.By bus.10.Who will go with the two speakers?A.Jacky.B.Betty.C.James.