请在以下程序第一行的填空处填写适当内容，使程序能够正常运行。___________(double,double)main(){double x,y;scanf(“%lf%lf”,&x,&y)printf(“%lf \n”,max(x,y))}double max(double a,double b){return( a>b?a:b)}
Listen and choose Linda’s reasons to study abroad
A. a good way to learn a foreign language
B. a chance to travel the world
C. a chance to widen her horizons and deepen her knowledge
D. to make friends with foreigners
E. to have close contact with other cultures
F. to develop social skills and diversify her life
下列哪种方法不能消除系统误差（ ）
A. 对仪器进行校准
B. 做空白试验
C. 增加平行测定次数
D. 做对照试验
下列叙述错误的是（）。
A. 系统误差呈正态分布
B. 方法误差属于系统误差
C. 系统误差具有重现性
D. 系统误差包括操作误差
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