本课配套习题挑战模式1/5
单选题
难度系数:
1.在1、-2、-5.5、0、、−、3.14中,负数的个数为( )
A: 3个 |
B: 4个 |
C: 5个 |
D: 6个 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNrui0n+aVsOeahOaEj+S5ie+8jOWwj+S6jjDnmoTmlbDpg73mmK/otJ/mlbDvvIzlhbbkuK0tMu+8jC01LjXvvIwtPGltZyB3aWR0aD02IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAwLzM4L3JCQUNGRk5zYV9TVG9GNTRBQUFCSFp6Wk5zSTI1OS5wbmciPuWwj+S6jjAuIOaJgOS7peaciTPkuKrotJ/mlbAu
- 答案:QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数:
2.如果用+0.02克表示一只乒乓球质量超出标准质量0.02克,那么一只乒乓球质量低于标准质量0.02克记作( )
A: +0.02克 |
B: -0.02克 |
C: 0克 |
D: +0.04克 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOmmluWFiOWuoea4hemimOaEj++8jOaYjuehruKAnOato+KAneWSjOKAnOi0n+KAneaJgOihqOekuueahOaEj+S5ie+8m+WGjeagueaNrumimOaEj+S9nOetlA==
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP5Y+v5b6X77ya6LaF5Ye65qCH5YeG6LSo6YeP6K6w5Li6K++8jOaJgOS7peS9juS6juagh+WHhui0qOmHj+iusOS4uu+8mjxpbWcgd2lkdGg9MjYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvMzgvckJBQ0ZGTnNhX25ERlhZUkFBQUJFTWFLVGpvNzk4LnBuZyI+77yMPGJyPuWboOatpO+8jOS9juS6juagh+WHhui0qOmHjzAuMDLlhYvorrDkuLotMC4wMuWFiy4gPGJyPuaVhemAiUIuIA==
本课配套习题挑战模式3/5
单选题
难度系数:
3.如果“盈利10%”记为+10%,那么“亏损6%”记为( )
A: -16% |
B: -6% |
C: +6% |
D: +4% |
一次做对,真牛!
+5奖励规则>
- 提示1:IOmmluWFiOWuoea4hemimOaEj++8jOaYjuehruKAnOato+KAneWSjOKAnOi0n+KAneaJgOihqOekuueahOaEj+S5ie+8m+WGjeagueaNrumimOaEj+S9nOetlC4=
- 答案:Qg==
6Kej77ya5qC55o2u6aKY5oSP5Y+v5b6X77ya55uI5Yip5Li64oCcK+KAne+8jOWImeS6j+aNn+S4uuKAnDxpbWcgd2lkdGg9MTAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0MvNDMvckJBQ0UxTnNhXzJRUncxSUFBQUF2aDY2VWw0NzM3LnBuZyI+4oCd77yMPGJyPuKItOS6j+aNnzYl6K6w5Li677yaLTYlLiA8YnI+5pWF6YCJ77yaQi4g
本课配套习题挑战模式4/5
单选题
难度系数:
4.在十米跳台跳水中,某运动员某次跳水向上跳的最高点离跳台2米,记作+2米,则水面到跳台的距离记作( )
A: +12米 |
B: -12米 |
C: +10米 |
D: -10米 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOacrOmimOmcgOWFiOagueaNruW3suefpeadoeS7tuWQkeS4iui3s+eahOacgOmrmOeCueemu+i3s+WPsDLnsbPvvIzorrDkvZwrMuexs++8jOS7juiAjOW+l+WHuuawtOmdouWIsOi3s+WPsOeahOi3neemuy4=
- 答案:RA==
6Kej77ya4oi15ZCR5LiK6Lez55qE5pyA6auY54K556a76Lez5Y+wMuexs++8jOiusOS9nCsy57Gz77yMPGJyPuKItOWcqOWNgeexs+i3s+WPsOi3s+awtOS4re+8jOawtOmdouWIsOi3s+WPsOeahOi3neemu+iusOS9nO+8mi0xMOexs++8mzxicj7mlYXpgIlELiA=
本课配套习题挑战模式5/5
单选题
难度系数:
5.对于有理数a,下列说法中正确的是( )
A: a表示正有理数 |
B: -a表示负有理数 |
C: a与-a中. 必有一个是负有理数 |
D: a2是非负数 |
一次做对,真牛!
+5奖励规则>
- 提示1:IOagueaNruacieeQhuaVsOeahOefpeivhuWIhuWIq+WvueWQhOS4qumAiemhuei/m+ihjOWIpOaWre+8jOazqOaEj+eJueauiuWAvOeahOi/kOeUqC4=
- 答案:RA==
6Kej77yaQeOAgeW9k2HvvJww5piv77yMYeihqOekuui0n+acieeQhuaVsO+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5C44CB5b2TYe+8nDDmmK/vvIwtYeihqOekuuato+acieeQhuaVsO+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5D44CB5b2TYT0w5pe2LiBh5ZKMLWHpg73kuI3ooajnpLrotJ/mnInnkIbmlbDvvIzmlYXmnKzpgInpobnplJnor6/vvJs8YnI+ROOAgWE8c3VwPjI8L3N1cD7iiaUw77yM5Y2z5Li66Z2e6LSf5pWw77yM5pWF5pys6YCJ6aG55q2j56Gu77ybPGJyPuaVhemAiUQuIA==