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【单选题】
_______ the obvious differences in size and population, the states of the U.S. have many things in common with Australia.A.
In spite of
B.
Instead of
C.
Even if
D.
Because of
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【单选题】If solutions of calcium iodide and ammonium chloride are mixed together in a metathesis reaction, what is the empirical formula for the precipitate which forms ?
A.
CaCl 2
B.
CaCl
C.
NH 4 Cl
D.
No precipitate forms
E.
A mixture of NH 4 Cl and CaCl 2 forms
【简答题】What volume of 0.1mol/L hydrochloric acid solution should be added to 50 mLof the following solutions respectively to prepare solution at pH =7.00? (1) 0.1mol/L NaOH solution. (2) 0.1 mol/L NH3 soluti...
【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】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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