【单选题】---- It's so cold! Why are your windows still open? ---- Oh, they _______.
【简答题】地貌的最小单位是 ;在地段的组成成分中, 是分异的主导因素。
【单选题】He says that if it _______ tomorrow , he _____fishing.
【单选题】He says that if it __ tomorrow , he ___ fishing
【单选题】Why won't the car start?
C.
The battery is broken.
【单选题】—It’s so cold! Why not close the door? —Sorry.It .I’ll have it repaired soon.
【简答题】He
says that if it _______ tomorrow , he _______ fishing .A. will rain , won't go B. rained , wasn't go C. rains , won't go D. rain , will go
【多选题】5下列哪些说法不正确
A.
PSTN拨号的优点是配置、开通简单方便,缺点是带宽窄,最高为64Kbpds,而且打电话和上网不能同时进行。
B.
ISDL的优点是数据传输数字化、质量高、可以在一条电话线上同时上网和打电话,缺点是速度慢,一般为56~128Kbps。
C.
ADSL的优点是能实现宽带上网,无需拨号并且不用交电话费,缺点是费用较高。
D.
Cable Modem优点是能实现宽带上网,同时还可以电话聊天,缺点是它采用共享的传输方式,用户不能得到固定的高带宽。