一维数字滤波

题型:名词解释

问题:

一维数字滤波

考点:地球科学地震勘探原理地震勘探原理题库
题型:名词解释

不能用于检测抗病毒抗体的方法是()。

A.ELISA

B.中和试验

C.红细胞凝集试验

D.血凝抑制试验

E.补体结合试验

题型:名词解释

某野战部队科研小组采用了偏二甲肼加氧化二氮(氧化剂)为燃料,精心研制了一枚小型火箭,现点燃火箭使火箭在垂直于地面的方向上运动.火箭点火后可认为做匀加速直线运动,经过5 s 到达离地面100 m高处时燃料恰好用完,若不计空气阻力,取g=" 10" m/s2,求:

小题1:燃料恰好用完时火箭的速度.

小题2:火箭上升离地面的最大高度.

小题3:火箭从发射到残骸落回地面所用的总时间.

题型:名词解释
不定项选择
导体的电阻是导体本身的一种性质,对于同种材料的导体,在温度不变时,下列表述正确的是(   )
A.横截面积一定,电阻与导体的长度成正比

B.长度一定,电阻与导体的横截面积成反比

C.电压一定,电阻与通过导体的电流成正比

D.电流一定,电阻与导体两端的电压成反比

题型:名词解释

百日咳起病后经过多长的初咳期才进入痉咳期()

A.1~3天

B.3~5天

C.1~2周

D.3~4周

E.4~5周

题型:名词解释

Our family finally managed to get together, but in a few days we scattered again to the ends of the earth, and I will begin my new job in a new city. My family has never been ___1 _  in this way . When I think about the    2    future, my heart felt grayish. 

When I    3    in the morning, it was raining outside and the sky was as    4    as my mood. My daughter    5    the new skirt that her uncle bought and she flew around the departure hall in the    6     and drew a small and beautiful picture in the dim crowd.

The airplane had a good   7    of newspapers, magazines, television programs, food and drinks. The meal even   8   a serving of Haagen-Dazs ice cream. This small present brightened me up   9    . The gentle smile of the stewardess(空姐)was as beautiful as the   10    after the rain. 

When I    11    the airport, the language that entered my   12   was completely different from what I was   13    three hours ago. Although the street lights were as   14  as Allentown’s, the different clothes and expressions of the people    15     me that I am in a new world. I stood in the busy streets like Alice    16   the world in a fairy tale. My heart was    17    with puzzlement about the uncertain future and longing for the new life. When I   18  being able to do what I like once more, that I will make new    19   and that I can enjoy the fun of exploration. I could not   20  to think about starting my new life.  

1.A.separated                B.gather                C.divided                     D.surprised

2.A.bright                    B.exciting              C.uncertain            D.unusual

3.A.stood up                 B.got up                C.stayed up            D.woke up

4.A.clear                      B.high                   C.dark                   D.gray

5.A.dressed                   B.wore                  C.liked                  D.had

6.A.station                    B.airport               C.port                   D.house

7.A.offer                      B.number                     C.supply                D.amount

8.A.included                 B.contained          C.followed            D.matched

9.A.successfully            B.especially           C.eventually          D.fortunately

10.A.rainbow                B.ground               C.sky                   D.flower

11.A.got on                  B.got off               C.left away            D.took off

12.A.mouth                  B.eyes                   C.mind                  D.ears

13.A.finding                 B.learning             C.hearing                     D.listening

14.A.long                     B.well                   C.brilliant              D.mamy

15.A.told                      B.reminded            C.suggested           D.explained

16.A.visiting                 B.traveling            C.wandering          D.exploring

17.A.full                      B.filled                 C.satisfied             D.pleased

18.A.set about               B.set out                C.thought over              D.thought about

19.A.friends                 B.enemies              C.mistakes             D.progress

20.A.wait                            B.help                   C.decide                D.afford

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