单项选择题

Which of the following is NOT true of the African elephants

A．They live to the south of the Sahara.
B．They can be divided into two species.
C．They are all larger than Indian elephants.
D．They have bigger ears than the Indian elephants.

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热门试题

单项选择题

Which feature makes FM radio relatively noise free

A．Its radio frequency is varied.
B．It is static free.
C．It has "preamplifier control" section.
D．It has a detector circuit.

单项选择题

In an FM radio, the Intermediate Frequency is usually ______.

A．10.7 MHz
B．455 kHz
C．540 kHz
D．1605 kHz