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【简答题】
18 编写函数用以求表达式 x 2 -5x+4 的值,作为参数传送给函数 . 调用此函数求: y1=2 2 -5*2+4 y2=(x+15) 2 -5*(x+15)+4 y3 =sin 2 x-5*sin x+4 y1 的值为 -2.0;x 为 0.5 时, y2 的值为 166.75,y3 的值为 1.832721 。
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【单选题】Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation?
A.
Will-powered soldiers
B.
military tactics
C.
railroad
D.
personal charm
【单选题】Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation?
A.
Railroad
B.
Will-powered soldiers
C.
Military tactics
D.
Personal charm
【单选题】Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation?
A.
will-powered soldiers
B.
military tactics
C.
railroad
D.
personal charm
【单选题】The young man was glad that his experience as a cook in the army finally ____ . [ ]
A.
paid off
B.
paid for
C.
paid up
D.
paid back
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