通信系统的供电方案可分为()和()两种。
参考答案:分散供电;集中供电
--Could I go skating with you, dad?
-- ____. You have to practice piano at home.
A.I am afraid not
B.Have a good time
C.Of course
D.You should do that
足太阳膀胱经根、结的相应腧穴是()。
A.人迎、厉兑
B.至阴、睛明
C.听会、足窍阴
D.攒竹、养老
E.迎香、曲池