极量运动试验的目标心率是().
A.200-年龄
B.240-年龄
C.195-年龄
D.210-年龄
E.220-年龄
参考答案:E
Innovation is like a bamboo shoot. A bamboo shoot spends many years underground, and then it just peaks its head up like a seeding and it just shows up very quickly.
图为地球某日日照图,读图回答下列问题。
该图表示的是每年()(节气)的情况。此刻,太阳直射点的地理坐标是:()