当低倍镜换为高倍镜后
A:细胞数量变多,视野变暗
B:细胞数量变多,视野变亮
C:细胞数量变少,视野变暗
D:细胞数量变少,视野变亮
读图回答:
—Are you going to buy a new camera?—Yes. But there are so many cameras that I can't decide______________.