[图]等于2ln2。...

A . 1/2 B . 1 C . 2 D . 4

A . 粗实线的单线 B . 中实线的双线 C . 粗实线的双线 D . 中实线的单线

A . 5mm B . 1mm C . 1.5mm D . 2mm

A . 5 B . 10 C . 25 D . 50

A . A．3h气压变量为15hPa B . B．3h气压变量为降低1.5hPa C . C．3h气压变量为1.5hPa D . D．3h气压变量为降低15hPa

A . 正确 B . 错误

A、-1 B、0 C、1 D、不能确定

广义积分，<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17928616/2016071617423385400.jpg' />等于：（）<img src='https://img2.soutiyun.com/shangxueba/ask/17928001-17931000/17928616/2016071617430065536.jpg' /> A．A B． B C． C D． D

A．3h气压变量为15 hPa B．3h气压变量为降低1.5 hPa C．3h气压变量为1.5 hPa D．3h气压变量为降低15 hPa

是 否

设<img src='https: assets.asklib.com psource 2015102915421668542.jpg' />，记A=E+&alpha；&beta；T，则A3等于（）．</imgsrc="https:> A．<img src='https://img2.soutiyun.com/shangxueba/ask/17667001-17670000/17668949/2015102915423653298.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/17667001-17670000/17668949/2015102915424981022.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/17667001-17670000/17668949/2015102915431136151.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/17667001-17670000/17668949/2015102915433813072.jpg' />

极限<img src='https://img2.soutiyun.com/shangxueba/ask/17670001-17673000/17671737/2015102816591683505.jpg' />的值等于（）． A．0 B． 1/2 C． 2 D． +∞

A．1/2 B．1 C．2 D．4

<img src='https://img2.soutiyun.com/shangxueba/ask/18174001-18177000/18174800/2017062808542783259.png' />等于e^-2/π。（） 是 否

如果<img src='https://img2.soutiyun.com/shangxueba/ask/18750001-18753000/18750911/201607161730265765.jpg' />，则f（x）等于：（）<img src='https://img2.soutiyun.com/shangxueba/ask/18750001-18753000/18750911/2016071617303477441.jpg' /> A．A B． B C． C D． D

定积分<img src='https://img2.soutiyun.com/shangxueba/ask/19002001-19005000/19004405/2015110315375898047.png' />等于：（） A．1 B． 2 C． 3 D． 4

A．0.1A B．0.2A C．－0.1A D．－0.2A

A．20 B．10 C．5 D．0

7.线性分组码的最小汉明距离d_min等于最小非零码字重量。()