岩床是基性岩浆灌入岩层层理，形成的块状岩体。其特点：成分为基性岩；（）；与上下围岩平行；围岩有（）。
参考答案：规模不定；轻微变质
The difficulty which we had _______ with the local people has now been removed.
A．communication
B．to communicate
C．communicated
D．communicating
粪能
