呼吸器的硅胶变色到达总体的（）时需更换。
A.1/2
B.3/4
C.1/3
参考答案：B
Those people without children ________good care of by the government there.
A．are taking
B．are taken
C．have taken
D．were taking
位于大脑外侧沟深面的是（）。
A、额叶
B、颞叶
C、岛叶
D、顶叶
