73.Joan had often heard____ said that Marley had no money.
A.it
B.this
C.that
D.one
答案:A
照明开关的安装位置应便于操作,开关边缘距门框为()。
A、0.1m~0.15m
B、0.1m~0.2m
C、0.15m~0.2m
D、0.35~0.50m
(17+32)+68=17+______.这里运用了加法______,用字母表示是______.