用粪便检查确诊鞭虫感染的依据是检出鞭虫的（）
A、杆状蚴
B、虫卵
C、丝状蚴
D、幼虫
参考答案：B
The Southern States wanted to ______ the Union, so the American Civil War ______.
A．get away with; broke up
B．get away from; broke up
C．break away from; broke out
D．break away from; was broken out
锅炉尾部燃烧或烟气爆炸的原因有哪些？
