She'll go to Marcia's home _____ Saturday morning.[ ]
A. on
B. in
C. at
D. for
答案:A
Inflation has returned to( )the major industrial economics,forcing interest ratehigher from the lows after the global stock market crash of 1987.
A.fight
B.knock
C.enshrine
D.haunt
TTL与非门输入端全部接地(低电平)时,输出()。
A、零电平
B、低电平
C、高电平
D、可能是低电平,也可能是高电平