题目内容

微波发射机在将数字信号对载波进行调制之前须进行码型变换。

A. 正确
B. 错误

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避免汽车纵向倾覆、滑转的条件对后轮驱动的汽车为：汽车重心至后轴处的距离与汽车重心高度之比值（）道路附着系数。

A. 小于
B. 大于
C. 等于
D. 小于或大于

You work as a database administrator for Supportcenter.cn. In a production environment， users complain about the slow response time when accessing the database. You have not optimized the memory usage of the Oracle instance and you suspect the problem to be with the memory. To which type of object would you refer to determine the cause of the slow response？（）

A. The trace file
B. The fixed views
C. The data dictionary views
D. The operating system log fields
E. The dynamic performance views.

保温验算要求围护结构的总热阻（）最小传热

假远期信用证实际上是开证行给受益人的一种融资

A. 正确
B. 错误