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【单选题】
潮汐发电是利用（ ）来推动水轮机，由水轮机带动发电机来发电。A.
以波浪的能量
B.
用低沸点工质
C.
海水涨落和所造成的水位
D.
地下热水和蒸汽为动力源
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【简答题】图1-1是ISDN网络的部分示例图，端局A、C和端局/汇接局B为ISDN交换机，并采用No.7信令系统，STP为信令转接点。其中，交换局A、B、C的信令点编码分别用SA。SB、SC标识，信令转接点STP1、STP2的信令点编码为S1、S2标识，实线表示用户线路或局间中继线路，虚线表示信令链路，并用字母a到i标识。 交换局A的用户甲要呼叫交换局C的用户乙； （a）用户甲首先向交换局A发送（1）消息。...
【简答题】涡轮的任务是将热燃气的能量转换成()。
【单选题】Why are none of the people attending the conference allowed to park at the 5th and Main garage?
A.
They didn't make reservations on time.
B.
They aren't current clients.
C.
They only have temporary passes.
D.
They are from out of town.
【单选题】Why was capital punishment questioned in the mid-18th century in Europe?
A.
People began to criticize their government.
B.
Tile government was unjust in this period.
C.
People began to realize the value of life.
D.
Social critics were very. active at that time.
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