单项选择题
在电磁波的接收端,为了接收到所有需要的电磁波,并将信号取出,需要经过
A、需要用能量转换补件补捉波,然后再调谐和检波
B、需要用能量转换补件补捉波,然后进行调制和调谐
C、调解和调幅
D、调频和解调
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发生火灾时,可以选择跳楼逃生。()
A.正确
B.错误
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在Java中,下列接口或类不包括不包括在java.sql包中的是( )。
A、ArrayList
B、Connection
C、Statement
D、DriverManger
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以下说法错误的是( )。 A.
一个LTE子帧在时间上是1毫秒
B.
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C.
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帮助幼儿做好入小学前的准备,其出发点应该是()
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B、提高幼儿的自制力
C、掌握正确的握笔姿势
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变性后的蛋白质,其主要特点是 A.
分子量降低 B.
溶解度增加 C.
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生物学活性丧失
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食物呛入气管后正确的体位是头低足高位。()
A.正确
B.错误
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Read the following passage and decide the underlined part of the statements are facts (F) or opinions (O). Fill in the blanks with F for facts, O for opinion. (答案请输入大写字母,答案与答案之间无空格。)
The Box Boy
I was 16 when I found the first job. It was packing groceries. I thought everything was fine, until the end of the first day, when the manager told me not to return. I wasn’t sacking fast enough. I was a painfully shy kid, and I surprised even myself when I blurted out, “Let me come back tomorrow and try one more time. I know I’ll do better.” Speaking up went against my very nature, but it worked. I got a second chance. If you want to accomplish anything in life, you can’t just sit back and hope it will happen. You’ve got to make it happen. I was not a natural athlete when I began studying karate, but I trained harder than anyone else and was a world middleweight karate champion for six years. Later, when I decided to become an actor, I was 36 and had no experience. There were maybe 16,000 unemployed actors in Hollywood, and I’d be competing against guys who had already been in movies or on TV. If I had said, “I don’t stand a chance,” one thing is clear: I wouldn’t have. People whine, “I haven’t succeeded because I haven’t had the breaks.” You create your own breaks.
Chuck Norris( Famous actor who has starred in over 20 feature films)
3. ( ) I thought everything was fine, until the end of the first day, when the manager told me not to return.
4. ( ) I trained harder than anyone else and was a world middleweight karate champion for six years.
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函数
在区间
上的最小值是
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A、正确
B、错误
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列关于打印机的设置的说法不正确的是( )。 A. 要使打印机正常工作,必须安装打印机驱动程序 B. 安装打印机驱动程序时,打印机必须连在计算机上 C. 在一台计算机上可以安装多台打印机驱动程序 D. 如果安装多台打印机,其中一台称为默认打印机
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判断口对口人工呼吸是否有效,首先观察瞳孔是否缩小。()
A.正确
B.错误
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