在我国卫星广播电视传输中,图象视频信号采用()制,视频带宽为6MHz。

题型:填空题

问题:

在我国卫星广播电视传输中,图象视频信号采用()制,视频带宽为6MHz。

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题型:填空题
已知抛物线C1:y2=4ax(a>0),椭圆C以原点为中心,以抛物线C1的焦点为右焦点,且长轴与短轴之比为
2
,过抛物线C1的焦点F作倾斜角为
π
4
的直线l,交椭圆C于一点P(点P在x轴上方),交抛物线C1于一点Q(点Q在x轴下方).
(1)求点P和Q的坐标;
(2)将点Q沿直线l向上移动到点Q′,使|QQ′|=4a,求过P和Q′且中心在原点,对称轴是坐标轴的双曲线的方程.
题型:填空题
Big things were happening in my life the summer after I turned 13. In the middle of that summer, my parents   小题1:  my entire world and turned it upside down   小题2:  they told me they were getting a divorce. I couldn’t believe that our family was going to   小题3:. Though I always knew my parents weren’t very happy and they often   小题4: , I still wanted my family to stay the same.
My life changed completely   小题5:  the divorce. My mother and I moved into a small apartment across town,   小题6:  my father and brother, Bill, stayed in our house. I now became a   小题7:  whenever I went to see my dad and Bill on the weekends. And immediately I had my soon-to-be stepfather, Dan, whom I showed no   小题8:  in. I was depressed, especially after Dan and my mother married and I realized that there was no   小题9:  that things could change back to the way they were.
Even though I  小题10: all Dan’s attempts to get to know me and wasn’t very   小题11:  to him, he never gave up on me.  小题12:, I began to trust him. I realized that we actually had some things in   小题13: , especially when it came to movies and TV shows. We  小题14:  a lot of time together hanging out watching TV. That gave us a chance to talk and getto know each other.
Better still, Dan showed an interest in me that I had never experienced from my own father. Dan was always around when I needed   小题15:  on school or friends. Once I began to warm up to Dan, the three of us began spending a lot of time together. We often went out to eat and took short trips.   小题16:, I discovered that I had the happy family that I had always wanted.
I now realize my parents were  小题17:  about getting the divorce. Their divorce was the best thing to happen for all of us. My father also found happiness—he   小题18:  and had another child, my half-sister, Michelle.
At 13, I learned an important   小题19:  —change is not always the worst thing that can   小题20: . Sometimes, it is just what we need the most.
小题21:
A.createdB.shook C.enteredD.occupied
小题22:
A.unlessB.ifC.whenD.until
小题23:
A.break up B.hold upC.keep upD.show up
小题24:
A.whispered B.fought C.talkedD.competed
小题25:
A.throughoutB.beyondC.before D.after
小题26:
A.whereB.althoughC.whileD.that
小题27:
A.visitor B.relativeC.neighborD.stranger
小题28:
A.confidence B.interestC.fearD.anger
小题29:
A.doubt B.differenceC.pointD.way
小题30:
A.forgot B.supportedC.resistedD.valued
小题31:
A.seriousB.nice C.badD.generous
小题32:
A.Gradually B.ImmediatelyC.Usually D.Regularly
小题33:
A.mind B.troubleC.commonD.order
小题34:
A.spentB.wasted C.lost D.saved
小题35:
A.experienceB.informationC.impressionD.advice
小题36:
A.However B.BesidesC.EventuallyD.Occasionally
小题37:
A.wrongB.confidentC.guiltyD.right
小题38:
A.remarried B.returned C.changed D.left
小题39:
A.method B.truthC.skillD.word
小题40:
A.existB.remainC.continue D.happen
题型:填空题

心肌梗死患者发病后2~3d,血沉加快并持续()

A.1~8周

B.1~6周

C.1~4周

D.1~3周

E.1周

题型:填空题

检验批质量验收记录表主要填写哪两大类技术内容()。

A、主控项目

B、一般项目

C、强制性条文

D、规范文件条款

E、设计规定内容

题型:填空题

宣告我国进入航天时代的标志是()。

A.第一颗氢弹爆炸成功

B.第一颗原子弹爆炸成功

C.第一颗人造地球卫星发射成功

D.“神州五号”飞船发射成功

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