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单项选择题

若数据速率是10kbit/s，则AMI码的主瓣带宽是____kHz。

A．5
B．10
C．15
D．20

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未知题型

1979年冬，中共中央召开工作会议，主要讨论经济调整问题。会议通过了中央提出的调整国民经济的八字方针，即( )。

单项选择题

The following sets of sentences are not in the correct time order. Choose the correct one for them. How to Make Ice Cream in a Bag1) Seal the gallon bag securely.2) Open the bags, grab a spoon, and enjoy your ice cream!3) Gently rock the gallon bag from side to side for ten to fifteen minutes or until the contents of the quart bag have turned into ice cream.4) Put 1/2 cup of heavy cream, 1/2 cup of milk, 1/4 cup of sugar, and 1/4 teaspoon of vanilla into a quart-size sealable plastic bag.5) Close the quart-size bag and seal it tightly.6) Put 2 cups of ice and 1/2 to 3/4 cup of salt into a gallon-size sealable plastic bag.7) Surprise your friends on your next camping trip by making ice cream in a plastic bag.8) Place the sealed quart bag inside the gallon bag of ice and salt.
A、7 3 6 5 1 2 4 8
B、4 8 5 1 2 6 3 7
C、7 4 5 6 8 1 3 2
D、2 7 6 3 5 8 1 4

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依法必须进行招标的项目，招标人自行办理招标事宜的，应当向其上级监督管理部门审批。
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