3426320000读作( ),写成以“万”为单位的数是( ),省略亿后面的尾数约等于( )。
三十四亿二千六百三十二万;342632万;34亿
麻子仁丸用于()。
A.阴虚便秘
B.血虚便秘
C.气虚便秘
D.阳虚便秘
E.胃热津枯便秘
Two thirds of the earth _____ covered with water. [ ]
A. are
B. is
C. were
D. have been