已知圆x2+y2+2x﹣2y+a=0截直线x+y+2=0所得弦的长度为4,则实数a的值是( )
A:-2
B:-4
C:-6
D:-8
有的同学爱酗酒,有的爱吸烟,有的爱看黄色书刊……甚至因此走上违法犯罪道路。所以我们应该注意要( )
①不断提高自己的判断能力 ②不断提高独立思考和自我控制能力
③学会拒绝不良行为 ④避免盲目从众
Don't throw away some old things.We can____them.We can put our pens and pencils in____.They will be nice____.We can put flowers in some bottles;they will be nice____.We can stick some____together and put our cards in them.How interesting!
火眼金睛,辨字组词。
披____ 状____
坡____ 壮____