— Mabel, did you catch a cold again?
—Yes. I didn't realize the importance of doing enough exercise.
A:was afraid of
B:was unaware of
C:was worried about
Lucy is a(n) ______ girl and she doesn't like talking much.
定义行列式运算:a1a2a3a4=a1a4-a2a3.若将函数fx=-sinxcosx1-3的图象向左平移m m>0个单位后,所得图象对应的函数为奇函数,则m的最小值是( )
《马关条约》的签订使清政府完全成为帝国主义统治中国的工具。( )
2016年12月4日是我国第三个“国家宪法日”,当天,全国许多中小学开展了形式多样的宪法宣传教育活动。开展宪法宣传教育活动是因为( )