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【单选题】
普通螺纹特征代号为是( )。
A.
M
B.
P
C.
W
D.
L
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【简答题】计算下列波形的幅度和频率 ( 经探头接入 ) : ( 1 ) V / div 位于 0.2 档, t / div 位于 2 μ s 档。 1 H = 2div , D = 3div 2 H = 5div , D = 2div . 3 H = 3div , D = 5div ( 2 ) V / div 位于 0.05 档, t / div 位于 50 μ s 档。 1 H = 5div , D = ...
【单选题】Which of the following solutions has the highest pH?
A.
0.40M NaOH
B.
0.40M Ba(OH) 2
C.
0.40M NH 3 .H 2 O
D.
0.40M NaCl
【简答题】计算下列波形的幅度和频率 ( 经探头接入 ) : ( 1 ) V / div 位于 0.2 档, t / div 位于 2 μ s 档。 1 H = 2div , D = 3div 2 H = 5div , D = 2div . 3 H = 3div , D = 5div
【简答题】What is the determining factor in classifying whether a radio wave is a suce wave or a space wave?
【单选题】The lower the spreading factor, the more payload data a signal can convey on the radio interface.
A.
convert
B.
transmit
C.
transform
D.
generate
【单选题】The solutions of NH 4 Ac is
A.
acidic
B.
basic
C.
neutral
D.
unknown
【单选题】按CIF TIANJIN成交的合同,卖方完成交货任务是在(    )。
A.
装运港    
B.
目的港
C.
TIANJIN港    
D.
TIANJIN市内
【单选题】In my opinion , Tianjin is not as expensive in price as Beijing but Tianjin is in traffic.
A.
the most organized
B.
more organized
C.
so organized as
D.
as organized as
【简答题】计算下列波形的幅度和频率(经探头接入): (1) V/div位于0.2挡, t/div位于2 μs挡。 H=2 div, D=3 div;
【单选题】She has been in Tianjin for ten years. Tianjin has become her second _________.
A.
family
B.
house
C.
home
D.
room
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