【简答题】When I arrived, the whole family were _______________ in the dining room.
【简答题】当x在 点的左侧趋近于 ( )时, 函数y=f(x)无限趋近于一个常数a,我们称函数在 点处的左极限存在,记为( );同样,如果从右侧趋近时存在极限a,记为().
【多选题】现代西方式插花艺术具有( )风格与特点。
【多选题】传统西方式插花艺术具有( )风格及特点。
【简答题】When the whole room burst into a loud and prolonged laughter, how did he feel?