股骨干骨折的致病因素是
参考答案:B
下列哪项不是呼吸机撤离的指征()
A.呼吸困难的症状消失
B.神志清醒
C.血气分析正常
D.血压平稳
E.心肺功能良好
There are few _____ in the fridge. Let's go and buy some peas and carrots.[ ]
A. meat
B. fruit
C. vegetables
D. bread