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【简答题】
已知二次函数 的图象如图所示，ａ、ｂ、ｃ满足 （ ） Ａ、a＜0,b＜0,c＞0 B、 a＜0,b＜0, c＜0 C、a＜0,b＞0,c＞0 D、 a＞0,b＜0,c＞0
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皮皮学刷刷变学霸
举一反三
【单选题】对于用电设备容量在250kW及以下的供电系统,通常采用低压供电,( )。
A.
只需设置一个低压配电室
B.
需设置一个变电所和一个低压配电室
C.
需设置一个高压配电室和一个低压配电室
D.
只需设置一个低压变电所
【简答题】no longer/not...any longer
【单选题】We would ______ you to buy a small quantity for trial.
A.
suggest
B.
to suggest
C.
suggest to
D.
have suggested
【单选题】Potala Palace used to be such a ____ place that it was beyond the reach of common Tibetans.
A.
serene
B.
ecological
C.
subsidiary
D.
sacred
【单选题】Smoking is so bad for his health that he doesn't smoke _____. [ ]
A.
no longer
B.
no more
C.
any longer
D.
not more
【单选题】Beth has many friends now, she is not lonely ______. [ ]
A.
no longer
B.
any longer
C.
not longer
D.
no more
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