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【判断题】
n个独立的且服从同一个0~1分布的随机变量之和服从二项分布。A.
正确
B.
错误
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举一反三
【单选题】______ your Enquiry No.123, we are sending you a catalogue and a sample book for your reference.
A.
According
B.
As per
C.
As
D.
About
【单选题】日前国际上应用范围最广、用量最大、灭火成功率最高、造价较低的固定灭火系统,并被公认是最为有效的建筑火灾自救设施的是( )。
A.
室内消火栓灭火系统
B.
自动喷水灭火系统
C.
水幕系统
D.
雨淋灭火系统
【单选题】Your enquiry letter has ____our careful attention.
A.
drawn
B.
brought
C.
received
D.
invited
【单选题】I could not have fulfilled the task in time if it ______ for your help.
A.
had been
B.
has been
C.
was not
D.
had not been
【简答题】Your
enquiry for cotton shirts has been referred to us for attention.A. 涉及 B. 查阅 C. 提交 D. 转交
【单选题】( )your Enquiry No. 123, we are sending you a catalog and a sample book for your reference.
A.
According
B.
As per
C.
As
D.
About
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