等式“学学×好好+数学=1994”,表示两个两位数的乘积,再加上一个两位数,所得的和是1994。式中的“学、好、数”3个汉字各代表3个不同数字,其中“数”代表多少?
胆囊炎胆石症引起的腹痛以()为主。
A. 左上腹
B. 右上腹
C. 右下腹
D. 左下腹
There () two maps in the room.【be】房间里有两张地图。
I feel it's an honor()to attend the opening ceremony of the new bank.
A. to invite
B. of being invited
C. to be invited
D. having invited