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【单选题】
若冷冻机油中含有水分,油的透明度会(),出现这种情况需更换冷冻机油。
A.
增强
B.
降低
C.
不变
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参考答案:
举一反三
【单选题】下列属于输入设备的是
A.
键盘、鼠标、扫描仪、数位板
B.
显示器、鼠标 、键盘、打印机
C.
显示器、打印机、投影仪 、手写板
D.
投影仪、鼠标 、键盘、游戏手柄
【单选题】测量液体压力时,取压点应在管道下部,使导压管内不积存( )
A.
气体
B.
液体
C.
液体
D.
流体
【单选题】下列不属于输入设备的是()。
A.
打印机
B.
键盘
C.
鼠标
D.
游戏手柄
【单选题】下列医院常用给药外文缩写正确的是
A.
每日一次qh
B.
隔日一次qd
C.
每晚一次qen
D.
每晨一次qm
E.
每周一次qod
【单选题】听力原文:M: It says hare the next train is due in at 7:50. F: I know, but I don't know whether I can make that one. I'd rather call you from the station than have you waiting around for an hour. Q: What d...
A.
She asks the man to wait for her at the train station.
B.
She will call the man when she arrives at the station.
C.
She and the man will take the 7:50 train.
D.
She is sorry for keeping the man waiting for her for an hour.
【单选题】下列各设备中,全部属于计算机输出设备的一组是( )。
A.
鼠标、键盘、扫描仪
B.
话筒、音箱、绘图仪
C.
显示器、打印机、绘图仪
D.
打印机、音箱、游戏手柄
【单选题】已知脉冲信号f(t)=3[u(t+2)-u(t-2)],求其频谱函数F( )=()
A.
B.
6Sa( )
C.
6Sa( )
D.
12Sa(2 )
【单选题】听力原文:You know Sara. If She has an opinion, everyone has got to know it. Which of the following statements is true about Sara?
A.
She rarely makes mistakes.
B.
She makes known what she thinks.
C.
She has many original ideas.
D.
She doesn't like to express her opinions.
【单选题】When we apply the F-test, we need to know that
A.
an F-test should not be used under heteroskedasticity
B.
an F-test should not be used on testing a single restriction.
C.
an F distribution has one degree of freedom.
D.
an F distribution converges to a distribution asymptotically
【单选题】下列处方中常见的外文缩写,其含义是“每隔一日用药”的是
A.
qd.
B.
qn.
C.
qh.
D.
qs.
E.
qod.
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