In your class, you should allow students to voice their opinions,       they are different from your own.

A．until

B．unless

C．even if

D．as though

患者，男，67岁。胸痛、出冷汗，面色苍白，口唇发绀，HR120次/分，BP68/50mmHg，1h内无尿，ECG示V、V5导联，ST段弓背向上抬高，T波倒置，血中CTnT浓度为1ng/ml。

下列PVWP值中，哪一项提示中度肺淤血()

A．16～18mmHg

B．21～25mmHg

C．18～20mmHg

D．25～30mmHg

E．16～20mmHg