当89C51执行MOVX@DPTR,A指令时,伴随着信号有效。()
参考答案:对
选择填空。
He said that tall building in the town ______ the Bank of China. [ ]
A.is
B.are
C.was
对应最大巡航高度(39000Ft),最大正常座舱高度是()
A.8000ft
B.9550ft
C.11300ft
D.15000ft