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【单选题】
一棵左、右子树均不为空的二在先序线索化后,其空指针域数为( )。A.
0
B.
1
C.
2
D.
不确定
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举一反三
【单选题】Which of the following can be learned from Para.2?
A.
People over 50 spend less money on luxury items.
B.
Young people have become more economic because they earn less money.
C.
The increase of older generations has helped growth of American economy.
D.
Middle-aged or elderly models are more welcome in American commercials today.
【单选题】Which of the following statements is TRUE according to Para. 1?
A.
Doctors know less about chronotherapeutics than before.
B.
Doctors in the U. S. used to be thirsty to know more about the new medical field.
C.
The researchers insights are providing new strategies to cure common killers.
D.
The strategic use of time in medicine attracts more attention in the medical circle in the U.S.
【单选题】The expression 'more lenient'(Line 2, Para. 4)is closest in meaning to
A.
less controversial.
B.
more effective.
C.
more lasting.
D.
less severe.
【单选题】The word 'footnote' (Para. 1) means that the influenza in 1957 _____.
A.
was less important in American medical history
B.
imposed little influence on American population
C.
was less serious in terms of death toll
D.
got less attention of American medical experts
【简答题】An adjective meaning not changing. (Para 8)
【简答题】Para 8 ______
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