Lily, _____ this hat to your mother. [ ]
A. need
B. know
C. call
D. take
答案:D
如果a g某气体中含有b个分子,则c g该气体在标准状况下的体积是(NA为阿伏伽德罗常数)( )
A.22.4bcaNAL
B.22.4abcNAL
C.22.4bNAL
D.22.4bacNAL
哪个油箱安装有满油位传感器().
A.内侧油箱
B.外侧油箱
C.中央油箱
D.A+B