For each blank, choose the best answer from the four choices and write down on the answer sheet.

In (1) the strength of the carrier signal is varied to represent binary 1 or 0. (2) is a system that can map a name to an address and conversely an address to an name. (3) is a three -way handshaking authentication protocol that it’s packets are encapsulated in the point - to -point protocol. (4) is an approach that enables an ATM Switch to behave like a LAN switch. (5) is an guided media which is made of glass or plastic and transmits signals in the form of light.

1（）

A．FDM

B．DSK

C．FCK

D．ASK

依次填入下列横线上的成语，最恰当的一项是（）。
①总之，他们对于怎样微妙的事物，都觉得吃惊；而常人则______，故他们是常人而又有异于常人。
②走进花园，郁金香开的正盛，______的花朵在阳光下显得格外艳。
③有些同志经济建设上的浪费损失，已经______、习以为常了，变成了麻木不仁的恶习。
④大厅里摆放着各种各样的工艺品，______，琳琅满目。

A．熟视无睹；五颜六色；司空见惯；五光十色

B．司空见惯；五颜六色；熟视无瞎；五光十色

C．熟视无睹；五光十色；司空见惯；五颜六色

D．司空见惯；五光十色；熟视无睹；五颜六色