A:运动员出发后心跳加快,这是神经调节的结果
B:运动停止后心跳并不立即恢复到正常水平体现了体液调节的特点
C:出发后体温在较高水平上维持相对稳定,产热和散热达到动态平衡
D:途中运动员大量出汗,造成血浆的渗透压升高,应及时补充水分
如图,菱形ABCD的周长是16,∠A=60°,则对角线BD的长度为( )
Dear Jenny,
Now we are in the hospital of our city . My mother and I have a bad cold . We sees many children here . Some people have a cold. Some people have a headache. Some people have a fever. They a re waiting outside the doctor's room .Now it's our turn.
Yours,
Jack
4800÷240=____ 25×12=____ 16.5÷10%=____ 34 + 512 =____
1- 712 + 512 =____ 0.3²=____ 1.02-0.43=____ 14÷ 27 =____
89 × 34 =____ 67 ×2÷ 67 ×2=____