In order to enhance efficiency, E-mails are apt to use popularly accepted abbreviations, such as ASAP and BTW.

The International Union of Railways is abbreviated as（ ）．

The abbreviation ‘M/E’ is used to represent the .

A.measure equipment

B.main electrical

C.my engine

D.main engine

The abbreviation PPI in the Sperry Collision Avoidance System means ______.

A.plan position indicator

B.plain position indicator

C.plane position indication

D.policy proof of interest

In telex abbreviations，CFM and INFM refer to ______ and ______ respectively．

A.confirm，inform

B.confide，inflow

C.conform，infuse

D.confessed，inflame

In the sentence "The word soccer is a slang corruption of the abbreviation assoc.", the word "corruption" probably means ______.

A．a dishonesty

B．immoral behaviour

C．something such as a word that is changed from its correct or original form

D．word form

R. P. is the abbreviation in common use to stand for Right Pronunciation. ( )

In writing fax messages，plain language is often used，simplified words or abbreviations are often used．（ ）

The abbreviation“ ETD” stands for both “Estimate time Delivery” and “Estimate time for Departure”．（ ）