温室效应引起全球变暖已成事实。澳大利亚科学家又提出，与这一效应相伴的还有“地球变

--It’s said that John will be in a job paying over 860,000 _____ year.

-- Also get paid by _____ week.

A．the; the

B．a; the

C．the ; a

D．a ; a

消费者在购买商品或接受服务时，有权拒绝经营者的强制交易行为，享有______。

A．公平交易权
B．求偿权
C．结社权
D．受尊重权

安全通道根据施工需要可分为斜型走道、（）

与“枯鱼之肆”含义相似的成语是（）

A.涸辙之鲋

B.相濡以沫

C.枯木逢春

D.缘木求鱼

IP multicasting is a set of technologies that enable efficient delivery of data to many locations on a network. Rather than making multiple copies of a message intended to be distributed to multiple recipients at the (71) of origin of a message, multicasting initially sends just one (72) and does not copy it to the individual recipients until it reaches the closest common point on the network, thereby (73) the bandwidth consumed. Network performance is significantly (74) because it isn’t bogged down with the processing and transmission of several large data fries; each receiving computer doesn’t have to (75) the transmitting server for the file.

A. extending B. minimizing C. demolishing D. reducing