供应桥脑的血管为（）
A.颈内动脉
B.大脑中动脉
C.大脑前动脉
D.前交通动脉
E.基底动脉
参考答案：E
On account of fuel supplies being finite and many people being wasteful, we will have to install ________ solar heating device in our home.
A．some type of a
B．some types of a
C．some type of
D．some types of
破碎过程中，（）严防进入破碎机。
A.大快物料
B.金属物
C.细粉物料
