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消防一级网，又称城市覆盖网，消防一级网适用于保障城市消防通信指挥中心(主台)与所属消防支(大)队、消防站(设固定台)之间的通信联络。A.
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举一反三
【单选题】1 customer's securities account has a debit balance of $2,000. His commodity account has a surplus of $2,500. The carrying broker can:
A.
transfer funds from the commodity account to the stock account at the broker's discretion.
B.
not transfer funds without written permission from the customer.
C.
not transfer funds.
D.
treat the accounts as one account tomeet a margin call.
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