IEEE802.3标准的以太网的物理地址长度为______。
A. 8Bit
B. 32Bit
C. 48Bit
D. 64Bit
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The sentence "Close your book and listen to me carefully" performs a(n) ___ function.
A. interrogative
B. informative
C. performative
D. directive
The company ______ a new policy on employee Internet usage at the start of the year.
A. (A) formatted
B. (B) coined
C. (C) implemented
D. (D) ascribed
What do we know about Simon?（）
A. He likes his students a lot
B. He gives free French lessons
C. He is well paid for his French lessons
I can't go to Mexico this year but I'll go ______.
A. by and by
B. hand in hand
C. step by step
D. little by little
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