嵌顿性疝与绞窄性疝手术的主要关键在于正确判断疝内容物的生命力。
参考答案:对
-When did you borrow the English story-book?
-I borrowed it last week. I _____ it for a week. [ ]
A. have bought
B. have kept
C. have borrowed
D. borrowed
给出下面程序段: if(x>0)System.out.println("Hello."); else if(x>-3)System.out.println("Nice to meet you!"); elseSystem.out.pnntln("How are you");) 若打印字符串“How are you”,则x的取值范围是( )。
A.x>0
B.x>-3
C.x<=-3
D.x<=0&x>-3