血液亏虚，不能濡养脏腑经络，唇舌色淡的证候是（）
A.血寒证
B.血瘀证
C.血脱证
D.血虚证
E.气血虚证
参考答案：D
Every possible means ____ to save the wounded soldier up to now.
[ ]
A. was tried
B. were tried
C. have been tried
D. has been tried
简述单级膨胀无辅助冷剂的天然气深冷分离工艺特点？
