在观察装片时，由低倍镜换成高倍镜，细胞大小、细胞数目、视野亮

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问题选择题

在观察装片时，由低倍镜换成高倍镜，细胞大小、细胞数目、视野亮度的变化[ ]

A．变大、变少、变暗

B．变大、变多、变亮

C．变小、变多、变暗

D．变小、变多、变亮

答案

答案：A

填空题

在一张地图上，甲、乙两地的图上距离是3cm，而两地的实际距离为1500m，那么这张地图的比例尺为（）。

选择题

The number of people present at the meeting ________ about 1000, a large number of whom ________ experts from abroad.

A．was; was

B．were; were

C．was; were

D．were; was