感觉器官对适宜刺激的感觉能力叫（）。
A.绝对感觉阈限
B.感受性
C.感觉阈限
D.最小可觉差
参考答案：B
Carbon dioxide______from burning fuels is the most common of the so-called green house gases.[ ]
A. producing
B. having been produced
C. to be produced
D. produced
正常成人胆总管的直径为
A．1.0～2.0cm
B．2.0～3.0cm
C．0.5～1.0cm
D．0.6～0.8cm
E．0.2～0.4cm
