[简答题] avoid the obstacles on the road such asrocks

[简答题]To illustrate the obstacles that parents unconsciously place in their children’s educational path, I’ll tell you a little story: An excellent, conscientious elementary school teacher who I know has a group of twenty-five 4-year-old children. The brand new school still lacks some basic supplies for the pupils. Also, consumable classroom materials, such as scissors and paper, generally tend to be paid for by their parents, who deposit funds into a common account for the teachers to draw from as needed. Anyway, the first general parent-teacher meeting was held and the teacher stated that after having evaluated the students’ development during the first week of class, her evaluation was that her primary objectives would include encouraging sharing amongst the children and stimulating an early interest in reading by providing them with a small library of picture books for them to leaf through, which would be donated to the class by the children themselves. As you would expect at this age, m

[单项选择]Which of the following obstacles to efficiency least likely leads to overproduction（）
A. Extemal costs.
B. External benefit.
C. Common resource.

[填空题]Sometimes intervening obstacles may_____push and/or pull factors.

[简答题]results avoid opinion attitude lesson

[填空题]The passage mentions ______ obstacles that stand in the way of energy conservation.

[单项选择]Passage One Children should avoid using mobile phones for all but essential calls because of possible health effects on young brains. This is one of the expected conclusions of an official government report to be published this week. The report is expected to call for the mobile phone industry to refrain from promoting phone use by children, and start labeling phones with data on the amount of radiation they emit. The independent Expert Group on Mobile Phones, chaired by former government chief scientist William Stewart, has spent eight months reviewing existing scientific evidence on all aspects of the health effects of using mobile phones. Its report is believed to conclude that because we don’t fully understand the nonthermal effects of radiation on human tissue, the government should adopt a precautionary approach, particularly in relation to children. There is currently no evidence that mobile phones harm users or people living near transmitter masts. But some studi
A. the government should prohibit children from using cell phones
B. we should put down the phone for the sake of safety
C. the industry can have a right to promote phone use
D. children are safe using cell phones

[填空题]Athletes should avoid having drinks containing caffeine, for they are hundred-percent harmful to the athletes’ sports performance.

[填空题]Athletes should avoid certain kinds of supplements, for they may cause side effects which will do harm to the athletes.

[填空题] Il n’y a pas d’obstacles qui ____ (ne pas pouvoir) être franchis.

[简答题]介绍midden road is built

[单项选择]People try to avoid public transportation delays by using their own cars, and this （　） creates further problems.
A. in short
B. in case
C. in doubt
D. in turn