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【单选题】
以下关于PCM调制方法的描述中,错误的是()。A.
PCM是脉冲编码调制技术的缩写
B.
PCM调制方法需要先量化、后采样
C.
PCM技术的典型应用是语音数字化
D.
PCM是模拟数据数字化的常用方法
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【单选题】The man who provided relevant information would be offered a(n) _____ of $5000 for the arrest of the murderer, according to the news on TV last night.
A.
award
B.
reward
C.
prize
D.
price
【单选题】以下哪一个对于矢量数据模型描述是正确的?
A.
模型用 x- 和 y- 坐标来表达与存贮空间要素的几何特征
B.
模型用点、线、面来表示简单的空间要素
C.
矢量数据模型空间要素的表达取决于地图比例尺大小
D.
以上都是
【单选题】They had to eat a (n) ______ meal, or they would be too late for the concert.
A.
temporary
B.
hasty
C.
immediate
D.
urgent
【单选题】Eisenhower once believed that a national highway system would ensure military success in national defense.
A.
Y
B.
N
C.
NG
【单选题】The computer would develop friendships with humans in a (n)______ way.
A.
quick
B.
unpredictable
C.
productive
D.
inconspicuous
【单选题】You would be offered a(n) _____ of $5, 000 for the arrest of the murdered, according to the news on TV last night.
A.
prize
B.
aw ard
C.
reward
D.
result
【单选题】—Would you mind closing the window? It is windy outside./n—________________
A.
Not at all.
B.
Sure, go ahead.
C.
Why not?
D.
Yes, I would.
【简答题】在经济萧条时期，应该采用 ()的货币政策;在经济繁荣时期，应该采用()的货币政策。
【简答题】在经济萧条时期，应该采用_______的货币政策；
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