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【单选题】
单相桥式整流电路,变压器副边电压有效值为 40V ,整流二极管承受的最高反向电压为( )。A.
20V
B.
40V
C.
56 ． 6V
D.
80V
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【简答题】It is estimated that Chinese brands have roughly 90% of the domestic market for refrigerators and washing machines, ______ of the market for air-conditioners.
【单选题】Now, we have enlarged and()our domestic market and European market.
A.
consolidated
B.
merged
C.
purchased
【单选题】With domestic market booming, the country has expectations of economic ____ (复苏).
A.
vigor
B.
revival
C.
survive
D.
various
【单选题】Why does Patrick Sayer focus on the domestic market?
A.
Because he thinks global market is too big to make profits.
B.
Because he thinks that there are still too many barriers to cross-border business in Europe, let
C.
Because he thinks domestic market is more challenging.
【简答题】轴类零件外圆表面的主要加工方法为磨削和______。
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