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【判断题】
“一切坚固的东西，都烟消云散了。”是尤瓦尔·赫拉利说的。()A.
正确
B.
错误
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举一反三
【简答题】n. the receiver of a benefit
【单选题】To keep the Inmarsat-F antenna pointing atthe desired satellite, regardless of the ship's position and course,ithas a(n)____input from the vessel.
A.
operational radar
B.
AIS receiver
C.
steering control system
D.
gyrocompass
【单选题】In Go-Back-N, the receiver window indicates
A.
The packet sequence number that is missing
B.
The packet ID the receiver is expecting to receive
C.
The number of packets that a sender can retransmit
D.
The timeout value of the receiver.
【单选题】In Go-Back-N, the variable N indicates...
A.
The number of acknowledgment messages transmitted by the receiver.
B.
The maximum number of un-acknowledged packets.
C.
The number of error packets
D.
The number of parity bits.
【简答题】将下列句子译成汉语,注意句中有些冠词的特殊位置: 1. In this case the current (电流) exists for only half the cycle (周期) . 2. In such a case there is no current flowing in the circuit (电路) . 3. Sensitivity (灵敏度) is a measure of...
【单选题】青年男性巳做阑尾脓肿引流术,阑尾进一步处理最好是
A.
长期应用抗生素
B.
间断服中药消炎
C.
定期复查白细胞
D.
加强活动,防止肠粘连
E.
3个月后行阑尾切除术
【单选题】当合格证持有人通过外部委托方式由他人提供部 分或全部地面服务时，谁应当向相应的地面服务人员提供必要的训练，并对其操作的安全性负责。
A.
合格证持有人
B.
地面服务单位
C.
适航当局
D.
专业的航空院校
【单选题】A(n) _____________ reveals the subject of the communication to the receiver.
A.
paragraph
B.
opening paragraph
C.
closing paragraph
D.
sentence
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