下图为某岛屿的示意图。读图回答各题。
从成因分析,该岛应属于()
A.大陆岛
B.火山岛
C.珊瑚岛
D.冲积岛
参考答案:B
In order to finish the research, the professor always _______, for every day the light in hisroom didn’t go out until 4 a.m.
A.mixed up
B.cleaned up
C.turned up
D.stayed up
简述里程掉线比(WCDMA)。