【单选题】文章出处题 Overthe years , scientists havereported that different types of plants , from trees totomatoes , release compounds( 化合物 )into the air to help neighboring plants.These chemical warningsall have t...
【简答题】W: Well, that's an (1)____________ many people make. But the fact is bones are made of (2)_____________ living tissue that requires continuous maintenance and repair. M: Right. That's one of the thing...