问题
单项选择题
燃烧带是炉缸煤气的发源地，若燃烧带减小则（）
A、中心气流发展
B、边缘气流发展
C、中心过吹
D、边缘不足
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
燃烧带是炉缸煤气的发源地，若燃烧带减小则（）
A、中心气流发展
B、边缘气流发展
C、中心过吹
D、边缘不足
参考答案：B
| 阅读理解。 | |
Bike riding is a great way to get exercise and fresh air and share time as a family. But before your kids rush out and start biking, there's an important thing you need to consider -safety. Helmet (头盔)Basics Always wear a helmet when riding a bike, no matter where you are or how short the ride is. 1. ___. Here's why: Many bike accidents mean brain damage or death for someone who does not wear one while riding. To protect against brain injury, make sure your kids wear a correctly fitting helmet on every ride. Safe Clothing What kids wear when riding a bike is also very important for safety. Bright-colored clothes will help kids be visible on the road. Besides, 2. ____. Kids should never ride barefoot(赤脚)! Rules of the Road for Bike Riding Here are some must-know safety tips to teach kids: Stop at all stop signs and obey traffic lights just as cars do. Always stop and check for traffic in both directions when leaving a driveway. 3. ____. It's important to hear everyone else on the road. Making Safety a Family Activity One of the best ways to help kids learn safe bike riding is to set a good example by following the rules of the road yourself. 4. ______. It's also a great way to stay active as a family and spend valuable time with your kids! |