【简答题】通信系统中,称调制前的电信号为 基带信号,调制后的电信号为 _______信号。
【单选题】现给出10个数据3、3、5、1、6、4、6、2、5、9、6,8、8、7、11、它们的众数是:
【判断题】在西餐就餐时,取面包应该用手去拿,然后放在旁边的小蝶中或大盘的变沿上,绝不要用叉子去叉面包。
【简答题】Watch conversation 1 again and match the questions with the responses.
【判断题】取面包应用叉子去叉,然后放在旁边的小蝶中或大盘的边沿上。
【判断题】纸页收缩越大,则成纸伸长率越高,吸湿变形性也越大。
【简答题】What is a decoding? What is the difference of encoder and decoder?
【单选题】从人基因组中分离、克隆一个基因所要面临的一个基本问题是:基因组大小有 ( )碱基对,而一个基因长度通常只有 ( ) 碱基对。
【简答题】1 What is the difference between atomic structure and crystal structure? 3.2 What is the difference between a crystal structure and a crystal system?
【单选题】Watch Conversation 1 and choose the best way to complete the sentences. The conversation takes place ____.
A.
in college before the racing begins
B.
on the river bank during the rowing race
C.
in the boathouse after the practice race
D.
when Kate and Janet are walking along the river on the way to the boathouse