丘脑的非特异性投射系统的主要作用是
A.引起痛觉
B.引起温度觉
C.引起触觉
D.使机体进入睡眠状态
E.维持大脑皮层的兴奋状态
参考答案:E
In the summer of last year, he achieved his ______ of winning a medal in the Beijing Olympic Games.
A.confidence
B.qualification
C.ambition
D.instruction
将4.90g氯酸钾与1.62g二氧化锰混合后,放入试管加热,充分反应后,试管中剩余固体物质的质量约是[ ]
A.1.62g
B.2.98g
C.4.60g
D.6.52g