下载APP
【单选题】
The example of an egg on a skateboard is used to show that （）
A．eggs break easily on a moving skateboard
B．cars should not be stopped suddenly
C．seat belts are important to safety
D．driving is a erous act
A.
Cars are lots of fun, but they could also be erous. We have to be careful when we drive them or ride in them.
B.
It’s always a good idea to put on your seat belt when you’re in a car. Why Think about this example: You put an egg on a skateboard(滑板) and give it a push. If the skateboard hits a stone, it will stop, but the egg won’t. It will fly through the air, hit the ground and break.
C.
Now, think what would happen if you tied the egg to the skateboard. When the skateboard hits a stone, the egg won’t go flying. It will stay safely on the skateboard.
D.
Volvo, a famous Swedish carmaker, was the first to use seat belts in 1949. Air bags are also very important for car safety, because sometimes a seat belt isn’t enough. If the car is going really fast and runs into something, seat belts could even hurt the people who wear them.
E.
Most newer cars have air bags in front of and next to the seats. When a car hits something, its air bags will come out quickly--in less than one second--to keep the people inside safe.
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】A. B. C. D.
A.
若(1+x)+(1+x)2+…+(1+x)n＝a1(x-1)+2a2(x-1)2+…+nan(x-1)n，则a1+2a2+3a3+…+nan=（）。
【单选题】属于保密内容的是
A.
一些医院片面追求最大利益，一些医务人员把医疗权力、技术当作牟取个人不正当利益的手段
B.
医疗服务不但要立足于现实，而且要立足于发展
C.
在行为前选择，在行为中监督，在行为后评价
D.
不将危重疾病的真实情况告诉患者
E.
在医疗服务中用尊称、敬称
【单选题】上述各项，涉及“公正”伦理问题的是
A.
有限的移植器官供体如何分配给需要者
B.
有些器官移植是在亲属间进行的
C.
用确认脑死亡病人的器官施行器官移植术
D.
器官移植者的人格完整有待完善
E.
器官移植的前景未达到全球的合作