工人在户外汗流浃背的施工。此过程中,工人体内产热和散热两个生理过程( )
A:产热与散热处于动态平衡
B:散热大于产热
C:产热与散热不受大脑神经的控制
D:散热小与产热
September 4 was my first day at Phillips Academy,my new school.It was also my 18th birthday.
I received a warm (1) from my host family—the Steins.Gena was my host mum,and her daughter Lily would also be a new
若函数fx=logax+1,(a>0,且a≠1)的定义域和值域都是0,1,则a=( )
根据我国第六次全国人口普查数据,绘制成全国人口年龄构成比例图和男女比例图。读图回答下题
甲、乙两车某时刻由同一地点沿同一方向开始做直线运动,若以该时刻作为计时起点,得到两车的x-t图象如图所示,则下列说法正确的是( )