儿童多动综合征肝肾阴虚证的治法是()
A.补益心脾,养血安神
B.清热涤痰,安神定志
C.益气养阴,健脾渗湿
D.滋养肝肾,平肝潜阳
E.滋肾养肝,凉血熄风
参考答案:D
设i=(1,0),j=(0,1),a=2i+3j,b=ki-4j,若a⊥b,则实数k的值为 ( )
A.-6
B.-3
C.3
D.6
What can you see?[ ]
A. I can see my teacher.
B. This is our classroom.