问题
单项选择题
Parents of a child with cystic fibrosis demonstrate knowledge of the effects of hot weather on their child when they state that hot weather is hazardous because the child has which of the following（）
A. Poor ability to concentrate urine.
B. Little skin pigment to prevent sunburn.
C. Poorly functioning temperature control center.
D. Abnormally high salt loss through perspiration.
答案
参考答案：D
解析：
One characteristic of cystic fibrosis is the excessive loss of salt through perspiration. Salt supplements are almost always necessary during warm weather or any other time the child with cystic fibrosis perspires more than usual.