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【单选题】
旅游者参加某旅行社组织的旅游活动，支付了旅游综合服务费人民币1500元，由于旅行社提供的服务属欺诈，按《消费者权益保护法》规定，旅行社应向旅游者赔偿人民币（）。A.
1500元
B.
2000元
C.
2500元
D.
3000元
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举一反三
【简答题】绝望的;孤注一掷的(a.):_____________________________
【单选题】The Fed is an active participant in money markets mainly because of its responsibility to
A.
lower borrowing costs to encourage capital investment.
B.
control the money supply.
C.
increase the interest income of retirees holding money market instruments.
D.
assist the Securities and Exchange Commission in regulating the behavior of other money market participants.
【单选题】The Fed is an active participant in money markets mainly because of its responsibility to _________
A.
lower borrowing costs to encourage capital investment.
B.
control the money supply.
C.
increase the interest income of retirees holding money market instruments.
D.
assist the Securities and Exchange Commission in regulating the behavior other money market participants.
【单选题】The company also embarked on a (desperate) cost cutting program...
A.
绝望的；孤注一掷的；极需要的
B.
荒凉的
C.
缺乏的
【简答题】Figure out how each concluding paragraph ends. Choose the proper method.
【判断题】方波信号通过傅里叶级数投影到三角函数集上，有如下展开公式：x(t)=(4*A/pi) * [ sin(2*pi*f*t) + (1/3)*sin(2*pi*3*f*t) + (1/5)*sin(2*pi*5*f*t) +............]因此，我们可以用１,３,５,７,９．．．．次正弦波谐波来合成出方波信号。
A.
正确
B.
错误
【简答题】设f(x)是周期为4的周期函数,在一个周期上f(x)= 试将其展开为傅里叶级数.
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