问题
选择题
Scientists have discovered that the moon stores great ______ fuel that can solve the earth's energy problem. [ ]
A. numbers of
B. masses of
C. deals of
D. many of
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Scientists have discovered that the moon stores great ______ fuel that can solve the earth's energy problem. [ ]
A. numbers of
B. masses of
C. deals of
D. many of
答案：B