13.955≈14,表示精确到十位.______.(判断对错)
13.955≈14,表示精确到个位;
故答案为:×.
My mother was so angry at ______ my brother was doing ______ she stopped him at once.[ ]
A. that, that
B. what, that
C. that, what
D. what, what
载波通信缺省波特率是()
A、1200
B、2400
C、4800
D、9600