对8位累加器A中的数据7EH若逻辑左移一次,则累加器A中的数据为()。
A.FEH
B.7CH
C.EFH
D.FCH
参考答案:D
The teacher made us ______ English exercises all the time. [ ]
A. did
B. do
C. doing
D. to do
连续性杂音见于()
A.继发性房间隔缺损
B.室间隔缺损
C.肺动脉口狭窄
D.动脉导管未闭
E.法洛四联症