题型:选择题 — I can't see the blackboard very well.—Perhaps you need____. [ ]A. to examine your eyes B. to have your eyes examinedC. to have examined your eyes D. to be examined your eyes 查看答案
题型:单项选择题 “嫦娥1号”为探测月球和月球以外的深空奠定了基础,例如我国建立月球基地天文台将成为可能。与地球相比,月球上有利于光学天文观测的条件是()A.存在大气散射B.没有大气的影响C.温度变化悬殊D.太阳辐射强烈 查看答案