A client had a nephrectomy 2 days ago and is now complaining of abdominal pressure and nausea. What should the nurse do first

A. Auscultate for bowel sounds.
B. Palpate the abdomen.
C. Change the client’s position.
D. Insert a rectal tube.

椭圆齿轮流量计属于：（）。

A.差压式流量计

B.容积式流量计

C.速度式流量计