It has a number of applications, ____________ may be mentioned its use in flash lamp

With the increase in the number of TV channels,______.

A．the cost of TV advertising has decreased

B．the number of TV viewers has increased

C．advertisers' interest in other media has decreased

D．the number of TV ads people can see has increased

There has been a collision a number of cars on the main road to town.

A) engaging B) composing C) involving D) consisting

A.are

B.have

C.is

D.has

There has been a collision ___ a number of cars on the main road to town.

A) composing B) consisting C) involving D)engaging

The number of the students in this city has _____ in comparison with 2001.

求答案！

Every host and muter on the Internet has an IP address,which encodes its(69).

A．host number

B．host number and socket

C．network number

D．host number and network number

A.by

B.in

C.to

D.for

A.has; have

B.has; has

C.have; have

D.have; has