A：having been invented it
B：one of whom invented
C：who had invented it
D：to have been invented
我国遭受地震灾害最为频繁和严重的省区是____。
—Did you see Tom at the party?
—No, he by the time I got there.
-- Whose guitar is it? -
法国作家雨果曾经这样形容人的心胸：“世界上最广阔的是海洋，比海洋更宽阔的是天空，比天空更宽阔的是人的胸怀。”发展友情，也需要有比天空更宽阔的气度。这说明我们在发展真挚友情时要注意（ ）
320平方千米=____平方米=____平方分米
