加热炉管烧焦过程中炉管呈桃红色时,下列处理正确的是()。
A、增加空气量、减少蒸汽量
B、增加蒸汽量、减少空气量
C、增加蒸汽和空气量
D、减少蒸汽和空气量
参考答案:B
按要求改写下列句子。
1. She has to go home now. (改为否定句)
She _____ _____ to go home now.
2. They didn't talk any more in class. (改为同义句)
They talked _____ _____ in class.
3. I had to take a bus because it was too far. (就画线部分提问)
_____ _____ you have to take a bus ?
4. David missed the early bus this morning. (改为同义句)
David _____ _____the early bus this morning.
5. The boy is very strong, He can carry the heavy basket.(合并为一个句子)
The boy is _____ _____ to carry the heavy basket.
放线菌个体为()体,根据菌丝在固体培养基上生长的情况,可以分为(),()和()。