下列不是亲属语言的一组是（）
A.英语、德语、荷兰语
B.汉语、苗语、瑶语
C.英语、俄语、阿拉伯语
D.藏语、汉语、彝语
参考答案：C
.Since I came here two years ago, great changes __________ in the factory and many people want to come here to pay a visit.
A have been taken place B. had been taken place C. have taken place D. are taking place
永久气瓶基准温度一般为（）
A.0℃
B.15℃
C.20℃
D.60℃
