轴流式通风机工作的上限是()。
A、应在驼峰区的左侧
B、应在驼峰区的右侧,工作风压小于最大风压值的0.9倍
C、应在驼峰区的顶点
D、通风机运转效率不低于60%
参考答案:B
颈部血管瘤的治疗不包括()。
A.手术切除
B.弥漫性生长者可口服生长抑素
C.激光照射治疗
D.放射治疗
E.糖皮质激素治疗
按要求完成句子。
1. I always go shopping on weekends. (对画线部分提问)
_____ _____ you always _____ on weekends?
2. She often goes to the movies. (改为否定句)
She _____ often _____ to the movies.
3. I watch TV every day. (对画线部分提问)
_____ _____ do you watch TV?
4. Li Ming goes to the library three times a month. (对画线部分提问)
_____ _____ _____ _____ Li Ming go to library a month?