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Solar Acells, which are often Bcall photovoltaic cells, are Ccomposed of single crystals of Dsilicon.
Solar Acells, which are often Bcall photovoltaic cells, are Ccomposed of single crystals of Dsilicon.
admin
2019-07-01
36
问题
Solar A
cells
, which are often B
call
photovoltaic cells, are C
composed
of single crystals of D
silicon
.
选项
A、
B、
C、
D、
答案
B
解析
Call is incorrect after are often because it is not the passive form. Correction: called.
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托福(TOEFL)
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