回流比越大，塔的分离效率越高。（）
参考答案：错
One solution to major security problems is (72) ,which are frequently installed to fix known security holes.
A．additions
B．compensations
C．patches
D．complements
女性，32岁。每于月经期出现鼻出血，应考虑（）
A.子宫内膜异位症
B.白血病
C.高血压
D.再生障碍性贫血
E.鼻炎
