转K2型调整下旁承垫板时,下旁承调整垫板总厚度为()。
A、2~20mm
B、2~25mm
C、2~30mm
D、2~35mm
参考答案:B
根据句意和汉语提示,补全单词.
1. It is a fact that English is being (接受)as an international language.
2. People travel to meet new friends, to try new food, and to (体验)life in other parts of the world.
3. She found a good job because she has a good (知讽)of computer.
4. This story (听起来)true. In fact, it is false.
5. It is a (传统)for people to give money as a gift during the Chinese New Year.
下表是有机物从植物传递到植食动物鳞翅目幼虫过程中部分能量流动的情况,根据表中数据不能得出的结论是()
A.鳞翅目幼虫的同化量为209.5J
B.食物中的能量只有15%用于了幼虫自身的生长
C.鳞翅目幼虫从第一营养级获取的能量有一部分以呼吸热能的形式散失,因此能量在生态系统中的流动是不可循环的
D.能量由植物传递到植食动物鳞翅目幼虫的效率为50%