进给力Ff是纵向进给方向的力,又称轴向力。( )
参考答案:错
Not easy as the problem of pollution is ____, no one should just stop trying.[ ]
A. to solve
B. to be solved
C. solving
D. being solved
严重脓毒症时使用糖皮质激素的意义包括()
A.控制全身炎症
B.促使核转录因子(NF.-кB的活化
C.补充患者相对糖皮质激素缺乏
D.纠正小动脉对升压药反应性丧失
E.改善肾上腺皮质对促肾上腺皮质激素反应性丧失