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【单选题】
The input impedance of the base of an emitter follower is usually______A.
high.
B.
shorted to ground.
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【简答题】Para.4 Abraham Lincoln 5. What enabled Lincoln to succeed despite all the misfortunes in his life? (Paras. 4) His ___________________.
【简答题】What enabled the earliest balloons to fly? [A] Gas produced by metal and coal. . [B] Air kept hot by burning coal. [C] Hydrogen heated by a. gas burner. [D] Natural gas carried in a metal container.
【单选题】下列哪个选项不属于新的电子商务环境下网络营销新特点.（）
A.
品牌危机爆发具有突发性
B.
企业对品牌掌控更加困难
C.
消费者个人信息难于获取
D.
消费者偏好数据难于获取
【单选题】What has enabled the volunteers to rescue all the remaining whales on the beach?
A.
The tide rising at noon.
B.
Buckets of water.
C.
Feverish rescue efforts.
D.
Many dump trucks.
【单选题】What enabled Abraham Lincoln to succeed?
A.
fortune
B.
optimism
C.
efforts
D.
ambition
【单选题】What enabled Lincoln to succeed despite all the misfortunes?
A.
His famous family
B.
His educational background
C.
His strong will
【单选题】What is true about version-enabled tables？（）
A.
The unit of versioning is the schema.
B.
It is possible to version enable a table pertaining to SYS.
C.
There are as many segments as versions for the same base table.
D.
It is possible to create workspaces if there is no version-enabled table in the database.
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