His parents meant him_____________ scientific research, but he showed no interest and turned poet.

A．going in for

B．to have gone in for

C．to go in for

D．having gone in for

写出下列事例中用到的物理知识：

(1)自去年冬天以来，我省出现比较严重的旱情，有关部门利用于冰升华时_____(选填“吸收''或“放 出”)热量的特点进行了人工降雨。

(2)夏天的晚上，为了驱赶蚊虫，小敏在房间里使用电蚊香，过了会房间里就充满蚊香的气味，这是因为________________________________________________