下列哪项临床表现对诊断骨髓瘤最有价值()
A．50岁以上的男性
B．全身性疼痛
C．尿中出现本周蛋白
D．进行性贫血
E．血清钙及球蛋白升高
参考答案：C
The teacher couldn't make himself attention to because the students were so noisy.[ ]
A. to pay
B. to be paid
C. paid
D. pay
灭火器要设置在不受风吹雨淋，阳光曝晒，潮湿和温度高的地方。
