单项选择题

It can be inferred from the text that

A．air shipment is indispensable to the industries giants.
B．customers are unwilling to pay for ground delivery.
C．new technologies help cut down on the cost of shipment.
D．the competition among freight shippers is very strong.

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单项选择题

It can be learned from the text that new start-ups

A．usually end up with a failure.
B．are subjected to rigid supervision.
C．tend to collapse as a whole.
D．never take into account failures.

单项选择题

The most favorable business ecology in Silicon Valley is characterized by

A．its waste products of success.
B．its abundance in constructive failures.
C．its solid foundation for innovations.
D．its laid-off dot-com programmers.