食管癌（）
A.胸痛伴咳嗽或咯血
B.胸痛，含硝酸甘油可缓解
C.胸痛伴吞咽困难
D.胸痛伴呼吸困难
E.胸壁刺痛伴皮疹
参考答案：C
______________ we wear, our family and friends may accept us, but the workplace may not.
A．However
B．Whatever
C．Whichever
D．Wherever
下列不属于溶液的用途的是[ ]
A．医疗上用的生理盐水
B．用熟石灰粉配制成喷涂墙壁的涂料
C．摔伤后涂擦在伤口处的紫药水
D．家庭里用做调味的白醋
