题干
A small bad deed may have a deadly ill________on children while a small kind will do the opposite.
A：affect
B：effect
C：power
D：control
答案(点此获取答案解析）
B
A small bad deed may have a deadly ill________on children while a small kind will do the opposite.
A：affect
B：effect
C：power
D：control
截直线
所得弦长等于 （ ）