根据所给的情景选择合适的表达。

1.当你想知道“她是谁”时，你说[ ]

A. Is this she?   

B. Who is he?      

C. Who is she?

2.当别人问你，“这是你爷爷吗？”，你可以回答：  [ ]

A. Is this your grandfather?              

B. Yes, he is.

C. No. she isn't.

3.你想看一看对方的家庭照片，你说：[ ]

A. Is this your family photo?    

B. Can I have a look at your family photo?

C. Yes, it is.

4.你猜测她是对方的妈妈时，你会说：[ ]

A. She's your mother, I think.

B. Is she your mother?

C. She's not your mother.

5.当你不确定这是不是对方的爸爸时    [ ]

A. This is your father.    

B. Is this your father?

B. He is your father.

肠管呈代偿性肥厚可引起低渗性缺水()
肠管迅速膨胀，肠管变薄，可引起等渗性缺水()
持续腹痛血便，肠鸣音微弱或消失有腹膜刺激征()
呕吐粪样内容物，高度膨胀()

A．绞窄性肠梗阻

B．慢性肠梗阻

C．急性完全性梗阻

D．动力性肠梗阻

E．低位肠梗阻