在使用显微镜时,可以调整光线强弱的是转换器和通光孔。( )
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本题考查显微镜的操作。调节显微镜视野明暗的结构为光圈和反光镜,转换器的作用是调节放大倍数,因此错误。
要了解某市国有工业企业生产设备情况,则统计总体是()。
A.该市全部国有工业企业
B.该市每一个国有工业企业
C.该市国有工业企业的每一台设备
D.该市国有工业企业的全部生产设备
35. My cellphone looked quite similar to Alice’s, but it cost ______ hers.
A.as much twice as
B.more than twice as much as
C.twice as more as
D.twice so much as