20世纪90年代末，某国中西部出现了罕见的灾害天气，导致该地区玉米产量比预计下降了53%，造成玉米价格大幅度上升。玉米价格的上升，不仅造成玉米需求量小幅下降，还造成小麦需求上升。这说明（ ）
| A．玉米的需求弹性较小，且玉米和小麦是替代商品 |
| B．玉米的需求弹性较大，且玉米和小麦是替代商品 |
| C．玉米的需求弹性较小，且玉米和小麦是互补商品 |
| D．玉米的需求弹性较大，且玉米和小麦是互补商品 |
相关试题
.My brother wants to work in the factory which ______ still ______.
| A．is/ building | B．has /been built |
| C．is /being built | D．is /to be built |
This is one of the happiest days ____ spent in my life.
| A．that have ever been | B．that has never been |
| C．which was ever | D．that had been |
---I _____ to a party, but I’ve got nothing to wear.
--- Why don’t you have a dress made for the party?
| A．was asked | B．will ask |
| C．have asked | D．have been asked |
This book _____ ten units, ______ three mainly revision.
| A．contains; including | B．includes; containing |
| C．contains; containing | D．includes; including |
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