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【简答题】
阅读理解。 A. It can protect your brain from being hurt in a bike accident B. Go for bike rides with your kids so you can show them what safe riding looks like C. Never wear ear-phones while biking D. You have to choose good shoes E. Check your child's bike to keep it safe and in good condition Bike Safety 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!
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【单选题】理想集成运放的差模输入电阻为( )。
A.
1MΩ
B.
2MΩ
C.
3MΩ
D.
【单选题】关于发动机舱数据图,叙述正确的是
A.
只能用点对点的尺寸表示
B.
只能用三维数据的方式表示
C.
用点对点的尺寸或三维数据的方式表示
【单选题】理想集成运放的差模输入电阻为( )
A.
1MHz
B.
2MHz
C.
3MHz
D.
【判断题】肿瘤是机体在各种致瘤因素作用下,局部组织的细胞基因调控失常,导致克隆性异常增生而形成的新生物。这种新生物常形成局部肿块。
A.
正确
B.
错误
【判断题】肿瘤是机体在各种致癌因素作用下,局部组织的某一个细胞在基因水平上失去对其生长的正常调控,导致其克隆性异常增生而形成的新生物。( )
A.
正确
B.
错误
【单选题】下列哪一条是肿瘤较正确的概念?
A.
机体在各种致瘤因素作用下,组织细胞增生所形成的肿块
B.
机体在各种致瘤因素作用下,组织发育异常
C.
机体在各种致瘤因素作用下,局部组织细胞异常增生而形成的肿块
D.
机体在各种致瘤因素作用下,器官发育不全
E.
机体在各种致瘤因素作用下,器官组织的反应性增生
【单选题】理想集成运放的差模输入电阻为( )。
A.
1MΩ
B.
2MΩ
C.
3MΩ
D.
无穷
【判断题】肿瘤是机体在各种致瘤因素的作用下,局部组织的细胞在基因水平上失去对其生长的正常调控,导致克隆性异常增生或凋亡不足而形成的新生物,这种新生物往往形成局部肿块。
A.
正确
B.
错误
【单选题】理想集成运放的差模输入电阻为( )
A.
1MCl
B.
2MCl
C.
3MC/
D.
【单选题】北约组织和华约组织的共同之处是()
A.
由一个大国控制的军事政治集团
B.
帝国主义性质的大国集团
C.
政治经济一体化集团
D.
代表不同意识形态的大国集团
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