电路图中,不画电器元件的实际外形图,而采用国家统一规定的电气图形符号。
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Only after Mary read her composition the second time _______ the spelling mistake.
A. did she notice
B. she noticed
C. does she notice
D. she has notice
It doesn’t matter _______ you pay by cash or credit card in this store.
A. that
B. wihch
C. whether
D. why
I wish to thank Professor Smith, without ______ help I would never have got this far.
A. whom
B. whose
C. that
D. which
Mike has written two novels, both of ______ have been made into television series.
A. that
B. whom
C. which
D. whose