The trend of brain drain does the developing countries _______ degrees of harm.
A. diverse
B. drive
C. diver
D. diversity
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Some experts say the _______ weather recently experienced by China was caused by EI Nino.
A. flexible
B. abnormal
C. selective
D. decent
51单片机内部定时/计数器是()计数器。
A. 14位加法
B. 16位加法
C. 16位减法
D. 14位减法
控制单片机工作模式的寄存器是() 。
A. CY
B. PSW
C. TMOD
D. TCON
寄存器TH0是()位的。
A. 1
B. 2
C. 8
D. 16