人体最经济、最安全的能量来源是碳水化合物。
参考答案:对
The accurate declaration for the export goods is made by the ().
A. consignee or his agent
B. consignor or his agent
C. Customs
D. any person
以下不构成无限循环的语句或者语句组是( )。
A.n=0;do++n;while(n<=0);B.n=0;while(1)n++;C.n=10:while(n);n--;D.for(n=0,i=1;;i++)n+=i;