调节人体产热活动最重要的体液因素是
A.去甲肾上腺素
B.肾上腺素
C.甲状腺激素
D.甲状旁腺激素
参考答案:C
With ________ successful launching of Tiangong1,China's space dream has taken ________ step closer to reality.
A.the;a
B./;a
C.a;the
D.the;/
简述素质教育的意义。