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【单选题】
血压的生理性变化,下列哪一项是错误的A.
睡眠不佳时，血压可稍升高
B.
傍晚血压高于清晨
C.
中年以后，女子略低于男子
D.
高热环境中血压上升
E.
寒冷环境中血压上升
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皮皮学刷刷变学霸
举一反三
【简答题】发送端要发送的数据是1101011011,利用CRC的生成多项式是P(X)=X 4 +X+1,试求 (1)应添加在数据后面的余数是多少? (2)如果数据在传输过程中最后一个1变成了0,问接受端能否发现? (3)如果数据在传输过程中最后两个1都变成了0,问接受端能否发现? (4)采用了CRC检验后,数据链路层的传输是否就变成了可靠的传输?
【单选题】John has really got the job because he showed me the official letter him it.
A.
offered
B.
offering
C.
to offer
D.
to be offered
【单选题】He showed great interest in my field of work. He asked me______ fresh developments.
A.
to keep him informing
B.
to keep him informed
C.
to be kept informed of
D.
to keep him informed of
【简答题】用award, reward填空。 1. He showed us the athletics _____ he has won. 2. What will you give me in _____ for my help? 3. The _____ for physics and chemistry are _____ by the Royal Swedish Academy of Scienc...
【简答题】He showed me the poems he ___________________ (write).
【单选题】The smile on my father’s face showed that he was ______ with me. [ ]
A.
sad
B.
pleased
C.
angry
D.
sorry
【判断题】在数据传输系统中的同步，就是指接受速度和发送速度保持一致，也就是接收端要根据发送端所发送信号的频率和起止时间来接收信号，接收端校准自己的接收时间和重复频率，以便和发送端的信号相一致。()
A.
正确
B.
错误
【单选题】He showed great interest in my field of work. He asked me______fresh developments.
A.
informing him of
B.
to inform. him
C.
to keep him informed of
D.
keeping him informed of
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