题目

I bought          China Daily from a street-corner machine this morning． A．a page of             B．a piece of                C．a copy of                      D．a book of 答案：C河蚌、蜗牛和乌贼共同具有的特点是(    ) A.都有贝壳       B.都有外套莫 C.都用腹足运动               D.都用腕足捕食