结合水
参考答案：受电分子引力吸附于土粒表面的土中水称为结合水。
He had breakfast and _______ his office in the morning.
[ ]
A. left
B. left for
C. went
D. went for
调节温度的是（）
A、大脑
B、小脑
C、脑干
D、下丘脑
