更多"Why is it difficult to predict the "的相关试题:
[单项选择]Why is it difficult to predict the weather for in advance for Autumn
A. Some forecasting machines do not work well in hot weather.
B. The weather patterns are more changeable in the autumn.
C. Experts spend less time studying autumn.
D. The National Weather Service misplaced its spring and summer data.
[单项选择]Why is it difficult to predict the possible effects of electromagnetic fields on an airplane's computers
A. Because it remains a mystery what wavelengths are liable to be interfered with.
B. Because it is extremely dangerous to conduct such research on an airplane.
C. Because research scientists have not been able to produce the same effects in labs.
D. Because experts lack adequate equipment to do such research.
[单项选择]Why is transition so difficult
A. Because transition requires money and time.
B. Because many manufacturers are unwilling to change their equipment.
C. Because research on new materials is very difficult.
D. Because it takes 10 years.
[单项选择]That job is quite difficult. I can understand why you have ______ so many problems. ( )
A. run for
B. run over
C. run off
D. run into
[单项选择]Why is social behavior difficult to change
[单项选择]Why does breathing become difficult for humans during a tornado
A. The wind becomes fast and hot.
B. Air pressure gets steadily lower.
C. The black area moves closer.
D. They are knocked to the ground.
[单项选择]Why underground pipes are difficult to be identified
A. Water and gas pipes are not taken care by construction workers.
B. Underground pipe systems were destroyed during World War Ⅱ.
C. Many city planning blueprints can be found nowhere.
D. Pipes were buried too deep underground.
[单项选择]Why is it difficult to combine television with Internet
A. Because the two media have different bandwidth.
B. Because the response times of Internet is long and erratic.
C. Because the two are operated on different principles of services.
D. Because the platforms are quite expensiv
[单项选择]Why is it difficult for young consumers to borrow money from bank
[单项选择]Why is it difficult to say exactly how many miles of improved waterways are in operation
[单项选择]Why is it difficult for public policy to improve the market outcome
A. Because it is difficult to measure the inefficiencies.
B. Because perfectly competitive firms produce identical goods.
C. Because a new firm would offer a product different from those of the existing firms.
D. Because surplus is maximized under monopolistic competition.
[单项选择]Why it is difficult to say exactly how many miles of improved waterways are in operation
[单项选择]Why is it more difficult today to be good parents
[单项选择]Why do we use the weather satellites to take pictures of the atmosphere
A. Because clouds form there.
B. Because the weather satellites can do it easily.
C. Because the weather forms there.
