平针组织的编织机器主要是台车，台车一般有（）个成圈系统。
A.1～5
B.3～8
C.8～24
D.没有常见的范围
参考答案：B
In fact, most people in some developed countries are ___ than they were two years ago because of the global financial crisis.
A．poorer off
B．badly off
C．worse off
D．richer off
以下哪种不属于癌前病变（）
A.白斑
B.口腔扁平苔藓
C.口腔黏膜下纤维性变
D.盘状红斑狼疮
E.着色性干皮病
