草花摘心时间一般幼苗长出（）片叶时进行。
A.1-2
B.3-4
C.5-6
D.7-8
参考答案：B
证券服务机构是一种证券中介机构。( )
The monks let ______ outside their enclosures, and then they have great freedom too.
A．them to wander
B．to them wandering
C．them wander
D．them wandering
