Which of the following statements can best describe the telephone in the U. S?
A.It's very inexpensive.
B.It saves a lot of trouble.
C.It's very convenient.
D.A ,B and C
第1题
观察T管引流的胆汁,哪项表示胆总管下端有阻塞可能:
A.胆汁量过多
B.胆汁量过少,色深,厚
C.胆汁混浊
D.胆汁量少而色淡
E.胆汁棕色稠厚而清
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