皮层下调节自主神经系统活动的中枢位于（）。
A.脑干
B.丘脑
C.下丘脑
D.小脑
参考答案：C
铁矿石中，根据脉石成分中CaO+MgO/SiO2+Al2O3的比值小于0.5的，称为（）矿石。
I have been looking for you everywhere. This is the _____ place in the world I would have expected to find you.
A．right
B．last
C．just
D．only
