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【单选题】
设随机变量X的分布函数【图片】,则P{X ≥ π/6}的值为( ).
A.
1
B.
2
C.
0.5
D.
0.2
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A.
resisted; hooked on
B.
accepted; addicted to
C.
distributed; involved in
D.
refused; devoted to
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【单选题】用于连接文件sec1和文件sec2的内容,写入chapter1中的命令是()
A.
ca tsec1 sec2 chapter1
B.
cat sec1 sec2> chapter1
C.
comm sec 1sec2 chapter1
D.
comm sec1 sec2>chapter1
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【单选题】——Mr President, do you plan to educate your two daughters to be officials?——To tell you the truth
A.
2.——Mr President, do you plan to educate your two daughters to be officials? ——To tell you the truth , 1 hope they can do whatever________their interests. A.fits
B.
matches
C.
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D.
Needs
【单选题】sec x的导数
A.
sec x cos x
B.
sec x tan x
C.
sec x cot x
D.
sec x csc x
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