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【多选题】
电子商务系统安全包括()。A.
硬件安全
B.
用户安全
C.
软件安全
D.
运行安全
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皮皮学刷刷变学霸
举一反三
【简答题】A．delicious B．dubious C．durable D．deliberate
【单选题】An aircraft requires a planned overhaul each year at a cost of $5,000. This is a condition of being allowed to fly.How should the cost of the overhaul be treated in the financial statements?
A.
Accrued for over the year and charged to maintenance expenses
B.
Provided for in advance and charged to maintenance expenses
C.
Capitalised and depreciated over the period to the next overhaul
D.
Charged to profit or loss when the expenditure takes place
【单选题】What is not mentioned about overhaul require
A.
Overhaul repair is a major repair
B.
Overhaul repair is carried out in a book
C.
overhaul requir is carried out once a year
D.
Overhaul repair is done for the purpose of rating
【简答题】某正弦交流电压,频率为50赫,最大值为20伏,初相位为-40°,此正弦交流电的瞬时值表达式u=()V。
【简答题】某正弦交流电流,频率为50赫,最大值为20安,初相位为-40 °,此正弦交流电的瞬时值表达式为 ,相量式为 。
【简答题】某正弦交流电流,频率为50赫,最大值为20安,初相位为-40°,此正弦交流电的瞬时值表达式为 A。
【简答题】某正弦交流电压,频率为50赫,最大值为20伏,初相位为-40°,此正弦交流电的瞬时值表达式为 ,相量式为 。
【单选题】Prior to any overhaul work on electric equipment, it is important to ensure the circuits are ___ .
A.
live
B.
dead
C.
excited
D.
on line
【判断题】ICC (C) shall not cover deliberate damage to or deliberate destruction of the subject matter insured or any part thereof by the wrongful act of any person or persons.
A.
正确
B.
错误
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