答案:D
在安静状态下,人体调节产热活动最重要的体液因素是()。
A.甲状腺激素
B.肾上腺素
C.去甲肾上腺素
D.乙酰胆碱
E.孕激素
一Why are you ready ________ Jour study in America?
一Because English is spoken ________ the first language there. [ ]
A. to; by
B. for; as
C. to; as
D. for; by