直放站在市电停电后，直放站还能正常工作几个小时（）A.3小时 B.6小时 C.8小时

根据短文内容,回答问题(10分)

Ayumi lived with her mother when she was a kid．She couldn't remember her father because he left the family when the girl was five and never came back．Ayumi's mother gave her much freedom to do whatever she liked，because the mother was always at work．

Ayumi was a model when she was young．After graduating from junior high school，she left home to take entrance exams to an art school in Tokyo with her friends，but to her surprise，she was the only one that failed．

After that，when someone offered her a chance to be a singer，Ayumi refused，because she thought she wasn't good at singing． But later，she changed her mind — she couldn't find any other jobs．

Her first song came out in 1998 and soon attracted attention．Her first albums(唱片) A Song for ×× came out in 1999 and quickly sold over one million copies． Each of her albums has sold very well since then．She has become "the Queen of Pop" in Japan．

根据短文内容回答下列问题。

小题1:Why did Ayumi's mother give her much freedom?

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小题2:What result did Ayumi get in her entrance exams to an art school in Tokyo?

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小题3:At first, why did Ayumi refuse the chance to be a singer?

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小题4:What's the name of Ayumi's first album?

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小题5:When did her first song come out?

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前斜头畸形的额颅塑形手术可选用

A．Hoffman法

B．Whitaker法

C．Marchac法

D．Rougerie法

E．Posnick法

“拟晶”(quasicrystal)是一种具有凸多面体规则外形但不同于晶体的固态物质。Al₆₅Cu₂₃Fe₁₂是二十世纪发现的几百种拟晶之一，具有合金的某些优良物理性能。有关这种拟晶的说法错误的是 [ ]

A．Al₆₅Cu₂₃Fe₁₂的硬度比金属Al、Cu、Fe都大

B．Al₆₅Cu₂₃Fe₁₂中三种金属的化合价均可视作零

C．Al₆₅Cu₂₃Fe₁₂不可用作长期浸泡在海水中的材料

D．1mol Al₆₅Cu₂₃Fe₁₂溶于过量的硝酸时共失去265mol电子

下列项目中按税法规定应视同销售的有（）。

A、将购买的货物用于赠送客户

B、将自产的货物用于抵顶所欠职工工资

C、将购买的货物用于本单位基本建设

D、将委托加工收回的货物作为对外投资

花键槽磨损到什么程度？