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【判断题】
<273>将氢氧化钠溶液和氨水溶液各稀释一倍,两者的氢氧根浓度也各稀释一倍。A.
正确
B.
错误
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举一反三
【单选题】— Was your father at home last night? — No, my father wasn't at home. He ______ to help to send the old man to hospital. [ ]
A.
asked
B.
was asked
C.
was asking
D.
had asked
【单选题】your father at work the day yesterday?
A.
Was; before
B.
Is; before
C.
Was; after
D.
Is; after
【简答题】若方程 表示焦点在y轴上的椭圆，则实数m的取值范围是 [ ] A．（-16，25） B. C. D.
【单选题】I ___ to your excuses for making so many mistakes.I shall report to your father at once.
A.
listened
B.
will not listened
C.
listen
D.
am not listening
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