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【单选题】
对于下列现象的解释中正确的是( )A.
熟了的苹果总要落回地面，说明地球对苹果有引力而苹果对地球没有引力
B.
起重机吊重物上升时绳子断了，重物还能上升一小段距离，因为绳子的拉力还没瞬间消失
C.
踢出去的足球最终会停下来说明足球没有惯性
D.
汽车关闭发动机后还能滑行一段距离，这是因为汽车具有惯性
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反馈参考答案：
举一反三
【单选题】假设你想证明:每一个可以写成k(k+1)(k+2)的整数乘积都能被6整除。如果你想用分情形证明法来证明它,那么你应该用下面哪一个集合?
A.
乘积以3结尾;乘积以6结尾;乘积以9结尾。
B.
当k被3除,余数为0;当k被3除,余数为1;当k被3除,余数为2;
C.
k=3^n,k≠3^n
D.
k是质数,k不是质数。
【单选题】According to the article, how can we prevent the increasing burden of diabetes mellitus?
A.
early detection
B.
better care
C.
improved education about the disease
D.
all of the above
E.
none of the above
【简答题】债务负担(debt burden)
【单选题】The central government is taking measures to the prices of daily necessities.
A.
put down
B.
turn down
C.
bring down
D.
take down
【简答题】Be ______(prepare) for financial loss and get advice on how to alleviate that burden in the future.
【单选题】[Based on Figure 6-17] How is the burden of the tax shared between buyers and sellers? Buyers bear
A.
three-fourths of the burden, and sellers bear one-fourth of the burden.
B.
two-thirds of the burden, and sellers bear one-third of the burden.
C.
one-half of the burden, and sellers bear one-half of the burden.
D.
one-fourth of the burden, and sellers bear three-fourths of the burden.
【单选题】What is true about the burden of a tax imposed on gasoline?
A.
Buyers bear the entire burden of the tax.
B.
Sellers bear the entire burden of the tax.
C.
Buyers and sellers share the burden of the tax.
D.
The government bears the entire burden of the tax.
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