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【单选题】
GSM 的频段宽度是A.
25MHz
B.
35MHz
C.
30MHz
D.
60MHz
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参考解析：
知识点：
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举一反三
【单选题】______ that dress when I first saw you at the station?
A.
Were you wearing
B.
Have you worn
C.
Did you wear
D.
Do you wear
【简答题】根据词语搭配对以下字句进行连线
【单选题】听力原文：M: Hi, Susan. Where were you at lunchtime? I was saving a seat for you in the cafeteria. W: Oh, sorry to miss you, but my thirst for knowledge was greater than my pangs of hunger. M: I never had ...
A.
In the late rooming.
B.
Immediately after lunch.
C.
In the mid-afternoon.
D.
After the evening meal.
【简答题】Bullet journaling club Do you want to organize your life? Start a bullet journal! Bullet journaling has been described as “ the og toll for the digital age ” . What ’ s more, it looks beautiful, i...
【单选题】听力原文：M: Hi, Janet. Where were you at lunchtime? I was saving a seat for you in the cafeteria. W: Oh! Sorry to miss you. But my thirst for knowledge was greater than my pains of hunger! M. I've never h...
A.
Giving a lecture.
B.
Discussing political science.
C.
Working on a science problem.
D.
Reading twentieth-century literature.
【单选题】下列对离散傅里叶级数DFS定义错误的是（ ）
A.
周期离散时间序列基于 的正交分解定义 DFS
B.
正交基包含 区间内的所有复指数序列 ，其中 的 取值是连续的
C.
如果周期为 的离散时间周期序列 可表示为 的线性组合，则称离散时间周期序列 可用正交基 表示
D.
取任意一个 区间的复指数序列 均可构成正交基，即 是周期为 的周期函数
【单选题】Where were you at lunch time? I ________ a seat for you in the dining hall.
A.
saved
B.
was saving
C.
had saved
D.
have saved
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