中学生网络课堂本课配套习题挑战模式1/6
单选题
难度系数：
1.汽车速度是36km/h，运动员速度是10m/s，自行车1min通过0.6km的路程，则（ ）
| A: 自行车的速度最大 |
| B: 短跑运动员速度最大 |
| C: 汽车速度最大 |
| D: 三者速度一样大 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOaKiumAn+W6puWNleS9jee7n+S4gA==
- 提示2：IOaxvei9pumAn+W6puWMluS4ujEwbS9z
- 提示3：IOaxguiHquihjOi9pumAn+W6puaKijFtaW7lj5jmjaLkuLo2MHPvvIzmioowLjZrbeWPmOaNouS4ujYwMG3vvIzmsYLlh7roh6rooYzovabpgJ/luqbkuLoxMG0vcw==
- 答案：RA==
5rG96L2m6YCf5bqm5YyW5Li6MTBtL3M75oqKMW1pbuWPmOaNouS4ujYwc++8jOaKijAuNmtt5Y+Y5o2i5Li6NjAwbe+8jOaxguWHuuiHquihjOi9pumAn+W6puS4ujEwbS9zPGJyPuWboOatpETmraPnoa4=
本课配套习题挑战模式2/6
单选题
难度系数：
2.
某同学用正常速度匀速步行30m,需40s的时间,若以正常的速度用6min40s的时间沿操场跑道走完一圈,那么跑道的周长最接近( )
| A: 100m |
| B: 300m |
| C: 200m |
| D: 150m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx6YCf5bqm5YWs5byP5rGC5Ye65ZCM5a2m5q2j5bi45q2l6KGM55qE6YCf5bqmPC9wPg==
- 提示2：PHA+5oqKNm1pbjQwc+aNoueul+S4ujQwMHM8L3A+
- 提示3：PHA+5YaN55Sx6K6h566X6Lev56iL55qE5YWs5byP77yM5rGC5Ye65pON5Zy655qE5ZGo6ZW/PC9wPg==
- 答案：Qg==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0U4L0UwL3JCQUNFMU5OOUJEemJ3ODFBQUFIOGVxeXJRMDY1NC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRTgvRTAvckJBQ0UxTk45QkR6Ync4MUFBQUg4ZXF5clEwNjU0LnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogMjI4cHg7IGhlaWdodDogODVweDsiPjxicj48L3A+PHA+5omA5Lul5q2j56Gu562U5qGI5Li6Qjxicj48L3A+
本课配套习题挑战模式3/6
单选题
难度系数：
3.
如果一个物体作匀速直线运动，后4s内通过20m的路程，那么它前2s内的速度是（）
| A: 20m/s |
| B: 10m/s |
| C: 5m/s |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+54mp5L2T5YGa5YyA6YCf55u057q/6L+Q5Yqo77yM5YmNMnPnmoTpgJ/luqblkozlkI40c+eahOmAn+W6puebuOWQjDwvcD4=
- 提示2：PHA+5Yip55So6YCf5bqm5YWs5byP5rGC5Ye65ZCONHPnmoTpgJ/luqY8L3A+
- 答案：Qw==
PHA+PHNwYW4gY2xhc3M9Im1hdGhxdWlsbC1yZW5kZXJlZC1tYXRoIiBzdHlsZT0iZm9udC1zaXplOjIwcHg7Ij48c3BhbiBjbGFzcz0idGV4dGFyZWEiPjx0ZXh0YXJlYSBkYXRhLWNrZS1lZGl0YWJsZT0iMSIgY29udGVudGVkaXRhYmxlPSJmYWxzZSI+PC90ZXh0YXJlYT48L3NwYW4+PHZhciBtYXRocXVpbGwtY29tbWFuZC1pZD0iNCI+djwvdmFyPjxzcGFuIGNsYXNzPSJiaW5hcnktb3BlcmF0b3IiIG1hdGhxdWlsbC1jb21tYW5kLWlkPSI1Ij49PC9zcGFuPjxzcGFuIGNsYXNzPSJmcmFjdGlvbiBub24tbGVhZiIgbWF0aHF1aWxsLWNvbW1hbmQtaWQ9IjYiPjxzcGFuIGNsYXNzPSJudW1lcmF0b3IiIG1hdGhxdWlsbC1ibG9jay1pZD0iNyI+PHZhciBtYXRocXVpbGwtY29tbWFuZC1pZD0iMTAiPnM8L3Zhcj48L3NwYW4+PHNwYW4gY2xhc3M9ImRlbm9taW5hdG9yIiBtYXRocXVpbGwtYmxvY2staWQ9IjgiPjx2YXIgbWF0aHF1aWxsLWNvbW1hbmQtaWQ9IjEzIj50PC92YXI+PC9zcGFuPjxzcGFuIHN0eWxlPSJkaXNwbGF5OmlubGluZS1ibG9jazt3aWR0aDowIj4mbmJzcDs8L3NwYW4+PC9zcGFuPjxzcGFuIGNsYXNzPSJiaW5hcnktb3BlcmF0b3IiIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIxNCI+PTwvc3Bhbj48c3BhbiBjbGFzcz0iZnJhY3Rpb24gbm9uLWxlYWYiIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIxNSI+PHNwYW4gY2xhc3M9Im51bWVyYXRvciIgbWF0aHF1aWxsLWJsb2NrLWlkPSIxNiI+PHNwYW4gbWF0aHF1aWxsLWNvbW1hbmQtaWQ9IjIzIj4yPC9zcGFuPjxzcGFuIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIyNCI+MDwvc3Bhbj48dmFyIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIyNSI+bTwvdmFyPjwvc3Bhbj48c3BhbiBjbGFzcz0iZGVub21pbmF0b3IiIG1hdGhxdWlsbC1ibG9jay1pZD0iMTciPjxzcGFuIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIyNiI+NDwvc3Bhbj48dmFyIG1hdGhxdWlsbC1jb21tYW5kLWlkPSIyNyI+czwvdmFyPjwvc3Bhbj48c3BhbiBzdHlsZT0iZGlzcGxheTppbmxpbmUtYmxvY2s7d2lkdGg6MCI+Jm5ic3A7PC9zcGFuPjwvc3Bhbj48c3BhbiBjbGFzcz0iYmluYXJ5LW9wZXJhdG9yIiBtYXRocXVpbGwtY29tbWFuZC1pZD0iMjgiPj08L3NwYW4+PC9zcGFuPjxzcGFuPiA8L3NwYW4+NW0vczxicj48L3A+
本课配套习题挑战模式4/6
单选题
难度系数：
4.
如下图所示，在遵守交通规则的前提下，从标志牌到上桥最少需要（ ）
| A: 15min |
| B: 22.5min |
| C: 40min |
| D: 20min |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Zu+5LitMTVrbeihqOekuuWIsOS4iuahpei/mOaciTE1a23vvIzlm77kuK00MOihqOekuumZkOmAnzQwa20vaDwvcD4=
- 提示2：PHA+5qC55o2u6YCf5bqm5YWs5byP55qE5Y+Y5b2i5rGC5Ye65pe26Ze0PC9wPg==
- 提示3：PHA+5oqK5bCP5pe25o2i566X5Li65YiG6ZKfPC9wPg==
- 答案：Qg==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0U4L0UwL3JCQUNFMU5OODcteWpGeVdBQUFIcXRFQVdtQTczMC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRTgvRTAvckJBQ0UxTk44Ny15akZ5V0FBQUhxdEVBV21BNzMwLnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogMTU1cHg7IGhlaWdodDogOTZweDsiPjxicj48L3A+PHA+5omA5Lul5q2j56Gu562U5qGI77yaQjxicj48L3A+
本课配套习题挑战模式5/6
单选题
难度系数：
5.
一列车以126千米/小时的速度穿过一条隧道，用了2分30秒，火车长800 米，求该隧道的长度为（ ）
| A: 926m |
| B: 5250m |
| C: 4450m |
| D: 6050m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5o2i566X5Y2V5L2N5oqKMTI2a20vaOaNoueul+aIkDM1bS9zPC9wPg==
- 提示2：PHA+55Sx6K6h566X6Lev56iL55qE5YWs5byP5rGC5Ye65YiX6L2m6KGM6am255qE6Lev56iLPC9wPg==
- 提示3：PHA+6Zqn6YGT6ZW/562J5LqO6Lev56iL5YeP5Y675YiX6L2m6ZW/PC9wPg==
- 答案：Qw==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0U4L0UxL3JCQUNFMU5OOUlIUmN0VDFBQUFJWEVJcmQ5VTcyNS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRTgvRTEvckJBQ0UxTk45SUhSY3RUMUFBQUlYRUlyZDlVNzI1LnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogMjA1cHg7IGhlaWdodDogNzFweDsiPjxicj48L3A+PHA+5omA5Lul5q2j56Gu562U5qGI5Li6Qzxicj48L3A+
本课配套习题挑战模式6/6
单选题
难度系数：
6.
甲、乙两码头相距s,一艘轮船在静水中的速度为v1，水流的速度是v2， 设该轮船在静水中往返甲、乙码头所用时间为t,在流水中往返需要时间为t’。下列说法正确的是（ ）
| A: t<t’ |
| B: t=t’ |
| C: t>t’ |
| D: 无法判断 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 提示2：PHA+5Zyo6Z2Z5rC05Lit5b6A6L+U5LiA5qyh5omA6ZyA5pe26Ze0PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0U4L0UyL3JCQUNFMU5OOVZtQklDNnVBQUFCcUpWSWNjVTYzNC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRTgvRTIvckJBQ0UxTk45Vm1CSUM2dUFBQUJxSlZJY2NVNjM0LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjM0Ij48L3A+
- 提示3：PHA+5Zyo5rWB5rC05Lit5b6A6L+U5LiA5qyh5omA6ZyA5pe26Ze0PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0U4L0UyL3JCQUNFMU5OOVZuQXMzdXBBQUFEN3hqbGxZUTcxMC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRTgvRTIvckJBQ0UxTk45Vm5BczN1cEFBQUQ3eGpsbFlRNzEwLnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9IjI3MSI+PC9wPg==
- 答案：QQ==
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
