离心泵运转中振动大、有杂音可以采用的处理方法是()
A、校正电机轴与泵轴的同轴度
B、校直泵轴
C、更换叶轮,校正静平衡
D、检查调整,消除摩擦
参考答案:A, B, C, D
读下面的对话,搭配正确的画“√”,否则画“×”。
( ) 1. A: What's your name? B: His name is Danny.
( ) 2. A: What's this? B: It's a marker.
( ) 3. A: How are you? B: I'm fine, thank you, and you?
( ) 4. A: Where is the school? B: It's a school.
( ) 5. A: How many pens do you have? B: I have three.
女性,60岁,间断上腹痛4年。纳差,消瘦贫血。胃镜检查,黏膜红白相间,以白为主()
A.慢性浅表性胃炎
B.A型胃炎
C.B型胃炎
D.胃癌
E.十二指肠溃疡