目前国内的WAP网站只提供文本服务。（）
参考答案：错
There _______ work for us to do every day. [ ]
A. is many
B. is some
C. are lots of
D. are much
气缸套冷却水温在（）范围时，气缸套穴蚀最严重。
A.40～50℃
B.50～60℃
C.70～80℃
D.80～90℃
