题目

阅读理解 Failure is probably the most exhausting experience a person ever has. There is nothing more tiring than not succeeding. We experience this tiredness in two ways: as start-up fatigue (疲惫) and performance fatigue. In the former case, we keep putting off a task because it has either too boring or too difficult. And the longer we delay it, the more tired we feel. Such start-up fatigue is very real, even if not actually physical, not something in our muscles and bones. The solution is obvious though perhaps not easy to apply: always handle the most difficult job first. Years ago, I在茅海建的《天朝崩溃》中记载，1840年7月，中英第一次厦门之战，清军士兵被打死了9名。下面是档案中留下的部分个人资料：中营守兵林喜成，年二十五岁，系鸟枪手，母陈氏，妻李氏，子注。左营战兵吴观赏，年四十三岁，系鸟枪手，妻孙氏；左营战兵明禧，年三十九岁，系弓箭手，祖母林氏，母刘氏，妻陈氏；右营战兵张世泽，年五十九岁，系鸟枪手，母于氏，妻黄氏，男光灿。从中可以得出的历史结论包括①      当时没有正常的退役制度②当时没有正常的征兵制度③当时部队的战斗力低下④当时清军没有机动部队A．①B．①②C．①②③D．①②③④