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【单选题】
关于噪声电平,以下说法错误的是:()
A.
分别在直放站的输入端和输出端测试上下行噪声电平(对于光纤直放站,分别在中继端机的输入端和覆盖端机的输出端测试上下行噪声电平)。
B.
要求直放站上行噪声电平小于-36dBm。
C.
要求直放站到达施主基站(CDU端)的上行噪声电平小于-150dBm。
D.
设直放站上行噪声电平为PNR,从施主基站(CDU端)到直放站输入端的信号损耗为LP,则要求直放站上行噪声电平:PNR〈-120dBm+LP。
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【多选题】鉴定结果的可靠性与哪些因素有密切关系( )。
A.
试验地是否均匀
B.
栽培条件是否适宜、一致
C.
当年的气候条件
D.
鉴定方法的手段
E.
材料
【判断题】在消化道的不同部位,吸收的速度是相同的。( )
A.
正确
B.
错误
【简答题】听下面一段材料,回答第1至3题. 1. What can we learn about the man? A. He wasn't in this afternoon. B. He doesn't believe what Mr. Smith said C. He will buy a new light. 2. What did the woman fail to do this afterno...
【简答题】在消化道的不同部位,吸收的速度是相同的。( )
【判断题】在消化道的不同部位,吸收的速度是相同的,其吸收速度并不取决于该部分消化道的组织结构以及食物的组成。
A.
正确
B.
错误
【单选题】What can we learn from the conversation?
A.
a The man is quite sure that he’ll be accepted by the new company.
B.
b. The man can have 15 days off per year if he works in the new company for three years.
C.
c. The man is now working in a very small company.
D.
d.  The man earns about $65,000 at his present job.
【简答题】听下面一段材料,回答第1-2题. 1. What can we learn about James Black? A. He's a little fat. B. He is interesting. C. He smiles a lot. 2. How are James Black's lessons? A. Boring. B. Interesting. C. Important.
【单选题】下列哪一项不属于汽车维护的常用工具()
A.
开口扳手
B.
扭力扳手
C.
游标卡尺
D.
一字起子
【简答题】听下面一段材料,回答第1-2题. 1. What can we learn about Mr. Brown? A. He is in his office. B. He is at a meeting. C. He is out for a meal. 2. What will the man probably do next? A. Call back. B. Come again. C. Le...
【单选题】What can we learn about Americans studying abroad?
A.
China is a top destination for them.
B.
The number dropped slightly last year.
C.
Most of them study abroad for only one semester.
D.
Most of them want to learn more about other countries.
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