直线y=3x+3的倾斜角的大小为______．

找出下面文字中的五处语病，先写出有语病句子的序号，然后加以修改。

　　①在空军航空兵某师飞行大队长孟凡升参加一次集训时，驾机升空不到两分钟，突然发现飞机发动机转速异常、温度下降。②他迅速反应到发动机有重大问题。③在生死考验的瞬间，他立即与指挥员报告。④收到指令，他果断操纵飞机寻找场地，在确认飞机无法迫降后，才请示跳伞。⑤为了避开村庄，直到允许跳伞的最后时刻之际，他才跳伞。⑥伞刚打开，人就着地了。⑦孟凡升多次在短短的48秒内主动放弃跳伞机会，有效避免了更大损失。③48秒，生死关头见素质，更见精神！

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More than 6000 children were expelled(开除) from US schools last year for bringing guns and bombs to school, the US Department of Education said on May 8.

The department gave a report on the expulsions as saying handguns accounted for 58 percent of the 6093 expulsions in 1996—1997, against 7 percent for rifles(步枪) or shotguns and 35 percent for other types of firearms.

"The report is a clear sign that our nation’s public schools are cracking down(严惩)on students who bring guns to school", Education Secretary Richard Riey said in a statement, "We need to be tough-minded(坚强的) about keeping guns out of our schools and do everything to keep our children safe. "

In March 1997, an 11-year-old boy and a 13-year-old using handguns and rifles shot dead four children and a teacher at a school in Jonesboro, Arkansas. In October, two were killed and seven wounded in a shooting at a Mississippian school. Two months later, a 14-year-old boy killed three high school students and wounded five in Daducab, Kentucky.

"Most of the expulsions(开除), 56 percent, were from high schools, which have students from about age 13, 34 percent were from junior high schools and 9 percent were from elementary schools. " The report said.

From this passage we know that（）.

A．every American cannot have guns

B．only soldiers and the police can have guns

C．every American citizen can own guns

D．teachers have no money to buy guns

下面关于信息技术的说法正确的是（）

A.人类21世纪才进入到信息社会，信息、信息技术就相应产生了

B.当今，信息技术的发展速度超越了人们的想象

C.计算机技术就是通信技术

D.有了计算机才有了信息技术

所有一般纳税人均可领购使用增值税专用发票。 ( )

木偶净琉璃的“净琉璃”是一种（）。

A、剧种

B、牌名

C、文体

D、曲名