儿童计划免疫疫苗内容有()
A.卡介苗
B.脊髓灰质炎减毒活疫苗
C.百、白、破三联混合疫苗
D.麻疹减毒活疫苗
E.乙型肝炎疫苗
参考答案:A, B, C, D, E
设直线方程为l:(a+1)x+y+2+a=0(a∈R)
(Ⅰ)若直线l在两坐标轴上的截距相等,求直线l方程;
(Ⅱ)若l不经过第二象限,求实数a的取值范围.
This is one of the best films ______ this year.
A.they have been shown
B.that has been shown
C.that have been shown
D.which have been shown