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【单选题】
直齿锥齿轮标准模数是指A.
法向模数
B.
大端模数
C.
模数
D.
端面模数
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【简答题】把鼠标放在两个列标中间,鼠标出现+形状时,可以改变()。
【简答题】阅读理解。 We talked to 300 people. One hundred were from 11 to 18 years old. One hundred were from 19 to 26. One hundred were from 27 to 35 years old. We asked them what they like to do on weekends. Pleas...
【单选题】党的十八大以来,全面深化改革取得重大突破,压茬拓展改革广度和深度,通过( )多个重大改革方案,出台1500多项改革举措,夯基垒台、立柱架梁,全面深化改革的主体框架基本确立。
A.
360
B.
260
C.
460
D.
560
【简答题】Eight students in our school are from countryside. A hundreds B hundred C hundreds of D hundred of
【单选题】More than one hundred got saved from the fire _____ helicopter.
A.
in
B.
with
C.
by
D.
from
【单选题】Scientists have found that inserting genes from a plant virus into the genes of a plant susceptible to that virus increases the plant s resistance to the virus. Because viral diseases account for a si...
A.
In areas where two successive crops are raised per year, protecting the first crop from a virus will generally protect the second crop from that virus as well.
B.
By repeatedly attacking plants that are genetically altered to become virus-resistant, the virus often becomes less lethal to plants that are not genetically altered in that way.
C.
Plants that are genetically altered to become virus-resistant often pass virus-resistant genes on to their offspring.
D.
Plants that arc made genetically resistant to one kind of virus often acquire resistance to related viral strains as well.
E.
Plants that are made genetically resistant to one kind of virus are then more susceptible to infection by unrelated viruses.
【单选题】The distance from the center of England to south coast is about ______.
A.
one hundred miles
B.
three hundred miles
C.
one hundred and fifty miles
D.
six hundred miles
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