问题
单项选择题
( )严重影响木材的物理、力学性质，使其颜色、外形发生变化。
A．早材
B．心材
C．腐朽
D．边材
答案
参考答案：C
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( )严重影响木材的物理、力学性质，使其颜色、外形发生变化。
A．早材
B．心材
C．腐朽
D．边材
参考答案：C
What did Jim Cantalupo promise at a Wall Street meeting on April 7
A．McDonald’s will launch a 100-day campaign for a larger market.
B．McDonald’s will make adjustments to further improve its qualities.
C．As the world’s biggest fast-food chain, McDonald’s will make further expansions.
D．McDonald’s will open 100 more chain stores in the near future all over the world.