5(a2b-3ab2)-2(a2b-7ab2).
原式=5a2b-15ab2-2a2b+14ab2
=(5-2)a2b+(-15+14)ab2
=3a2b-ab2.
If you insist on smoking heavily like that, you will have to suffer the ________ sooner or later.[ ]
A. achievements
B. causes
C. consequences
D. exchanges
男性,25岁。因车祸撞伤腹部,病人诉腹痛难忍,伴恶心、呕吐。X线腹透,见膈下游离气体,拟诊为胃肠道外伤性穿孔。
该病人的处理不正确的是()。
A.禁食、输液
B.胃肠减压
C.应用大剂量抗菌药
D.给予吗啡止痛
E.尽快术前准备