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【单选题】
第四代移动通信的峰值速率可以达到100Mbit/s,为了实现这个峰值速率,系统带宽需要( )。A.
10MHz
B.
1.6MHz
C.
3.75MHz
D.
20MHz
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举一反三
【单选题】-I'm worn out, ________， the bike doesn't work well, so I can't go farther. -Then, we'd better have a rest here. [ ]
A.
apart from
B.
except for
C.
beside
D.
besides
【单选题】The door______. We'd better have it repaired.
A.
isn't shut
B.
hasn't been shut
C.
won't be shut
D.
won't shut
【单选题】以下符合运动镜头编辑点的组接原则的是( )。
A.
跟拍一辆行驶的汽车.切换到马路七坐着的人
B.
左摇的镜头未落幅马上接一个右摇镜头
C.
几个连续右摇的风景镜头组接在一起
D.
摇镜头还未落幅便再接一个静止的固定镜头
【单选题】We'd better have our meals______.
A.
at the same time each day
B.
when our work is over
C.
when the meal is still hot
D.
when every one of the family is home
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