在局域网中，若采用10BASE-T标准，其中数字10表示的含义是
A. 传输速率10b/s
B. 传输速率10kb/s
C. 传输距离10km
D. 传输速率10Mb/s
石结构周的砌筑砂浆分为( )级别
A. 10个
B. 8个
C. 7个
D. 5个
The handle of the nanobrush is ______.
A. thicker than a human hair
B. thirty billionths of a meter across
C. a few millionths long
D. relatively smaller than the brush
In the long run, English learning, difficult as it is, is ______ to a learner iii his or her career devel- opment.
A. profitable
B. advantageous
C. prominent
D. rewarding
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