挑战习题
1/5单选题
难度:

1.一杂技演员,用一只手抛球. 他每隔抛出一球,接到球便立即把球抛出,已知除抛、接球的时刻外,空中总有四个球,将球的运动看作是竖直方向的运动,试求球到达的最大高度是多少. (高度从抛球点算起,取
A 3.2m
B 4.2m
C 6.4m
D 3.4m
提示1:
IOavj+S4gOS4quWwj+eQg+Wdh+WBmuerluebtOS4iuaKm+i/kOWKqA==
提示2:
IOi/kOWKqOeahOWvueensOaApw==
正确答案:QQ==
5q+P5LiA5Liq5bCP55CD5Z2H5YGa56uW55u05LiK5oqb6L+Q5Yqo77yM55Sx6L+Q5Yqo55qE5a+556ew5oCn77yM5qC55o2u6aKY5oSP5Y+v5b6X5Ye66Iez5bCR5pyJ5aaC5Zu+5omA56S655qE54q25oCB77yM5YiZPGltZyB3aWR0aD0xODQgaGVpZ2h0PTM4IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMkMvNkQvckJBQ0UxTmd5NWJUNTQ2NUFBQUVRRFV6elBZMTQzLnBuZyI+77yM5Y2z55CD6IO95Yiw6L6+55qE5pyA5aSn6auY5bqm5pivPGltZyB3aWR0aD0zNCBoZWlnaHQ9MTggc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMC82My9yQkFDRkZOZ3k1YnhuelNwQUFBQnNDbzVYOG83NjQucG5nIj4uIA==