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【简答题】
解方程组 x+y=2 x 2 +xy-2 y 2 =0 ．
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举一反三
【单选题】With her hands so full, she____to the concert last night.
A.
wouldn't go
B.
oughtn't to go
C.
shouldn't have gone
D.
mustn't go
【单选题】— Why does Sara know so much about Angkor Wat? —She ____ have been there, or... [ ]
A.
must
B.
oughtn't to
C.
may
D.
can't
【单选题】— Why does Alice know so much about Angkor Wat? — She ______ have been there, or ...
A.
must
B.
oughtn't to
C.
may
D.
can't
【单选题】—Why does Sara know so much about Angkor Watt?—She ______ have been there, or because of some other reasons.
A.
must
B.
oughtn't to
C.
may
D.
can't
【单选题】在进路遇有超限绝缘时,应把检查条件加在( )。
A.
QJJ 电路，由9线检查
B.
XJ 电路，由11线检查
C.
XJJ 电路，由8线检查
D.
XJ 电路，由7线检查
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