保险合同的双方当事人是（）。
A.受益人与保险人
B.投保人与被保险人
C.投保人与保险人
D.被保险人与保险人
参考答案：C
(2013·甘肃河西五市二模)In the middle of the forest ________， in which we often went fishing when I was a little child.
A．lies a deep lake
B．a deep lake does lie
C．a deep lake lies
D．does a deep lake lie
加热管结垢应该怎么办？
