【单选题】A2题型)男孩,11岁。突然出现上腹部钻顶样剧痛,伴恶心、呕吐。疼痛间歇发作。既往有肠道蛔虫病史。查体:右上腹深压痛,无反跳痛及肌紧张。应首先考虑为
【简答题】Everyone will be ( )after running Marathon.
【单选题】It is not ______ that everyone will be able to be famous persons.
【单选题】男孩,11岁。突然出现上腹部钻顶样剧痛,伴恶心、呕吐。疼痛间歇发作。既往有肠道蛔虫病史。查体:右上腹深压痛,无反跳痛及肌紧张。应首先考虑为
【简答题】数字通信是通过信源发出的 ________ 经过数字终端的信源编码成为 ________ ,终端发出的是数字信号,经过 _______ 后成为适合信道传输的数字信号,然后有 ________ 将信号调制到信号所使用的数字信道上,再传输到对端,经过相反的变换最终传到信宿。
【判断题】Janet expects that everyone will be watching the taiko performance.
【单选题】用示波器CH1观察数字信号发生器CH2通道输出的正弦信号,得到呈左右跑动的不稳定简谐信号。下列给出的分析中较不可能的是
【单选题】In this passage the author is trying to show that ______.
A.
everyone will be able to use computer and the Web by 2008
B.
computers will be able to recognize speech in 10-year time
C.
the use of the Web will become more common and easier in the future
D.
interaction with the Web will become easier to manage
【单选题】Soon everyone will be driving pollution-free cars.
C.
Give an opinion about the topic
【多选题】下面关于数字带通信号正确的描述是
A.
数字带通信号是指信源发出的没有经过调制的原始电信号