从6件正品与3件次品中任取3件,观察正品件数与次品件数,则下列事件既是互斥事件又是对立事件的是( )
A:“恰好有1件次品”和“恰好有2件次品”
B:“至少有1件次品”和“全是次品”
C:“至少有1件正品”和“至多有1件次品”
D:“至少有2件次品”和“至多有1件次品”
读中国地形图完成以下问题:
look good on, pay attention to, affect ones moods, important, fair
have problems with show off, remind me of, make a decision take action