8个二进制位至多可表示______个数据。
A.8
B.64
C.255
D.256
参考答案:D
解析: 因为28=256,所以,8个二进制位至多可表示256个数据。选项D为正确答案。
She saw light in the _____ and realized that there was a village _____. [ ]
A. sky; far
B. way ; far
C. distance; nearby
D. place; nearby
伪顶位于煤层之上随采随落的极不稳定岩层,其厚度一般在()以下。
A.0.3m
B.0.5m
C.1m
D.1.5m