承载式车身的结构特点是什么?

（π-2007）⁰+（-2）³-|-5|．

下列关于个人所得税的说法，错误的是( )。

A．个人所得税是对个人(自然人)取得的各项应税所得征收的一种税

B．个人所得税的纳税义务人，包括中国公民、在中国有所得的外籍人员(包括无国籍人员)和香港、澳门、台湾同胞

C．个人所得税的纳税义务人依据住所这一个标准，区分为居民纳税人和非居民纳税人

D．居民纳税人和非居民纳税人，分别承担不同的纳税义务

When Ben Franklin was only a boy, he always wanted to know about things. He was always asking his father and brothers ‘What?’ and ‘How?’ and ‘Why?’

They couldn’t always tell him what he wanted to know．

When they couldn’t tell him, Ben tried to find out for himself．

Many times Ben did find out things that no one knew before. The other boys would say, ‘That is Ben Franklin! He’s always finding out something new!’

Ben lived close to the water. He liked to go there to see the boats. He saw how the wind blew them across the water．

One day Ben said to himself: ‘Why can’t the wind help me float across the water? And I’m going to try.’ Ben got his big kite．He took hold of the kite string and ran with it. The wind took the kite up into the air．Then Ben jumped into the water．

The wind blew the kite high into the air．Ben began to float across the water．Soon he was on the other side, and he had not worked at all．

One boy shouted, ‘Look at Ben floating across the water! His kite takes him to the other side without any work!’

‘Yes,’ said another. ‘He’s always finding new ways to do things.’

小题1: When he was only a child, Ben____________.

A．liked to fly a kite by himself

B．always asked easy questions

C．always liked to play with water

D．always liked to find out how things worked小题2:His father and brothers_____________.

A．couldn’t answer all his questions

B．could answer all his questions

C．tried hard to find out something new for him

D．were too busy to answer his questions小题3: How did Ben Franklin float across the water? _______________.

A．The other boy took him across it.

B．The water carried him across it.

C．The flying kite took him across it.

D．A boat took him across it.小题4:He found out many things that______________.

A．children didn’t know

B．his father knew

C．people didn’t know

D．most people knew小题5: From the story we can see that young Ben Franklin liked____________.

A．using his mind

B．using his hands

C．making kites

D．flying kites

汽枪弹击碎玻璃的痕迹与其他膛线的枪支击碎玻璃的痕迹是不一样的。这是因为汽枪虽然有膛线，但它是用弹簧压缩空气作为动力来发射弹头，速度低、能量小、重量轻(每个汽枪弹重0.5克)，所以汽枪弹撞击玻璃时，对玻璃的作用时间长，作用力小，穿透能力小，对玻璃击碎痕迹也不同于石击玻璃的痕迹。
最能准确复述这段话主要意思的是( )。

A．汽枪弹击碎玻璃的痕迹不同于其他枪支子弹击碎玻璃痕迹

B．汽枪弹击碎玻璃的痕迹之所以不同于其他枪支造成的痕迹是由于它是用弹簧压缩空气作为动力的

C．汽枪弹撞击玻璃时，对玻璃的作用时间长

D．其他有膛线的枪支的弹痕也不同于石击玻璃的痕迹

军队领导指挥体制改革的总原则是什么？