蛔虫在人体寄生的部位是（）
A.小肠
B.大肠
C.盲肠
D.回肠
E.直肠
参考答案：A
It was on November 15, 2010 ______ a big fire happened in Shanghai, ______ was a great shock to lots of people.[ ]
A. when; that
B. that; when
C. which; when
D. that; which
什么是环境友好型社会？
