夏季,同纬度地区陆地气温比海洋[ ]
A.高
B.低
C.一样
D.以上都不对
答案:A
When why he behaved that way at table,he made no reply.
A.being asked
B.asked
C.asking
D.to ask
WDM系统的基本构成主要有哪两种形式?