单项选择题

The end of the bidding is called "knocking down" because______.

A．the person who offers the highest price wins
B．all the buyers win except one fail
C．the goods are knocked down on to the table
D．the auctioneer bangs the table with a hammer

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热门试题

单项选择题Earth scientists have come to understand that climate______.

A．is going through a fundamental change
B．has been getting warmer for 10 000 years
C．will eventually change from hot to cold
D．has gone through periodical changes

单项选择题Scientists believe that human evolution______.

A．has seldom been accompanied by climatic changes
B．has exerted little influence on climatic changes
C．has largely been effected by climatic changes
D．has had a major impact on climatic changes

单项选择题Evidence of past climatic changes indicates that______.

A．human activities have accelerated changes of Earth's environment
B．Earth's environment will remain mild despite human interference
C．Earth's climate is bound to change significantly in the future
D．Earth's climate is unlikely to undergo substantial changes in the future

单项选择题The message the author wishes to convey in the passage is that______.

A．human civilization remains glorious though it is affected by climatic changes
B．mankind is virtually helpless in the face of the dramatic changes of climate
C．man has to limit his activities to slow down the global warming process
D．human civilization mill continue to develop in spite of the changes of nature

单项选择题Fanning emerged as a survival strategy because man had been obliged______.

A．to give up his former way of life
B．to leave the coastal areas
C．to follow the ever-shifting vegetation
D．to abandon his original settlement