The word "cheque-writers" (Para. 4) is closest in meaning to _____.
A. tycoons
B. donators
C. investors
D. celebrities
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The phrase "a free lunch" (Para 1) implies that the free stuff on the Internet seems to be _____.
A. totally free
B. impossible as a free lunch
C. as right as the science
D. paid by someone you know
Which can be inferred from the first paragraph？
A. The quest for wisdom is an old-fashioned economic indicator.
B. When things proceed smoothly, people don"t need to go searching for wisdom.
C. Billionaires listed on the Forbes are demonstrating the profits of free market.
D. In the long run, all the wealthiest individuals will confess their ignorance.
焊嘴头被堵塞时，可将嘴头与平板摩擦，也可用通针清理，以消除堵塞物。()
The word "rightly" (Para. 5) can be best replaced by _____.
A. justly
B. understandably
C. evidently
D. appropriately
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