— Brian does well in math, ?
— . He always gets good scores in his math exams.
A:does he; Yes,he does
B:doesn't he; Yes,he does
C:does he; No,he doesn't
D:doesn't he; No,he doesn't
调节人体成为一个复杂、协调、统一的整体,使各种生命活动能够有序进行的系统是( )
若命题“∃x0∈R使得x02+mx0+2m-3<0”为假命题,则实数m的取值范围是( )
已知方程组ax-by=4ax+by=2的解为x=2y=1,则2a-3b的值为( )
①教育为人的幸福生活奠基
②发展教育是现阶段的中心工作
③教育是一个国家、民族最根本的事业
④教育能够提高各族人民的科学文化素质