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【简答题】
Translate the short passage into Chinese. 65.We are in receipt of your letter of May 1st. As requested, we are enclosing herewith three copies of our Proforma Invoice No. 880, on which you will find our keenest quotation CIF Hong Kong. Please note that this offer is subject to your reply being received not later than June 1st. Shipment can be made during July if your L/C reaches us by June 10th. As it is almost certain that the market price is rising steadily, we think it advisable for you to place your order without delay.
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【简答题】studies werve for delight, for ornament, and for ability. Their chief use for delight is in rpivateness and retiring; for ornament, is in discourse; and for ability, is in the dudgment and disposition...
【简答题】A．He has decided to continue his studies. B．He has still to make a decision. C．He has decided to give up his job. D．He has still to take a part-time job.
【单选题】( )能驱动交直流负载和( )只能驱动交流负载
A.
晶体管型 、 继电器型 、晶闸管型
B.
继电器型、晶体管型 、晶闸管型
C.
晶体管型 、晶闸管型、继电器型
D.
继电器型、 晶闸管型、晶体管型
【单选题】23 Feasibility studies occur in which life cycle phase (s)?
A.
Conceptual
B.
Conceptual or Development
C.
Execution
D.
Preliminary planning
E.
any life cycle phase
【简答题】常用的开关量输出接口按输出开关器件不同有三种类型:继电器输出 、晶体管输出和双向晶闸管输出,其中,( )可驱动交流或直流负载,( )只能驱动直流负载,( )只能驱动交流负载。
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