海尔集团的经营理念是“敬业报国，追求卓越”，这就是企业文化中的______
A．精神层B．物质层C．制度层D．行为层
参考答案：A
I wanted to buy a copy of The Youth, but there was _______ left in the bookshop. _______has just bought the last one.
A．no one; Everybody
B．something; Nobody
C．anyone; Somebody
D．none; Somebody
下列除哪项外均为仅能由冷热刺激引起疼痛的疾病（）
A.深龋
B.牙本质敏感症
C.坏死性牙髓炎
D.三叉神经痛
E.可复性牙髓炎
