单项选择题

In a bidding deal, ______

A．the buyer search from place to place for desired object
B．the government selects the best items
C．the government transacts with an individual
D．the sellers compete with each other for the hid

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热门试题

单项选择题

Compared with a chess player, lens designer______.

A．can put his design to mass production
B．can draw on various sources in his work
C．can reduce the cost of lens production
D．has no one to train him before taking up the work

单项选择题

In what way does lens design resemble chess

A．In the number of steps each takes towards the goal.
B．In the designs of the two activities.
C．The steps to the goals and the goal itself are known.
D．Each has a doer and a competitor.