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【单选题】
设 为 3 阶对称阵, 的秩 ,且满足条件 ,则 的特征值为( )。A.
0 ， -2 ， -2
B.
0 ， 0 ， -2
C.
-2 ， -2 ， -2
D.
0 ， 0 ， 0
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举一反三
【单选题】Task 3 Before renting the equipment from U-Haul, be clear about the following information. 1. I understand that this equipment must be returned to the same U-Haul location where it was rented. I u...
A.
To a free parking lot.
B.
To any U-Haul location.
C.
To where it was rented from.
D.
To the nearest U-Haul location.
【单选题】下面有效减少防护新冠状病毒感染方法错误的是:
A.
避免去疾病正在流行的地区
B.
减少到人员密集的公共场所活动,尤其是空气流动性差的地方,如商场、参观、影院、ktv、网吧火车站、地铁站你、飞机场等公共场所
C.
可以接触、购买和食用野生动物,避免前往售卖活体动物如禽类/海产品和野生动物等的市场,禽肉蛋要充分煮熟后食用
D.
保持良好生活和健康习惯。家庭成员之前不共用私人生活用品,生活垃圾不乱放,口鼻分泌物用纸巾包好,弃置于有盖垃圾箱内。注意营养,避免焦虑
E.
准备常用物资,家庭备至体温计、一次性口罩、家庭用的消毒物品等
【单选题】对关键字序列(56,23,78,92,88,67,19,34)进行增量为3的一趟希尔排序的结果为( )
A.
(19,23,56,34,78,67,88,92)
B.
(23,56,78,66,88,92,19,34)
C.
(19,23,34,56,67,78,88,92)
D.
(19,23,67,56,34,78,92,88)
【单选题】对关键字序列()进行增量为3的一趟希尔排序的结果为()。
A.
(19,23,56,34,78,67,88,92)
B.
(23,56,78,66,88,92,19,34)
C.
(19,23,34,56,67,78,88,92)
D.
(19,23,67,56,34,78,92,88)
【简答题】边界联合检查的含义
【简答题】Before renting the equipment from U-Haul, be clear about the following information . 1. I understand that this equipment must be returned to the same U-Haul location where it was rented. I understand...
【多选题】可能与持续感染发生有关的因素是：
A.
病毒抗原性弱，机体难以产生免疫
B.
机体免疫力低下，不能清除病毒
C.
病毒与宿主细胞基因整合，长期共存
D.
病毒存在受保护部位，逃避免疫作用
E.
受病毒感染的细胞形成包涵体
【单选题】Before renting the equipment from U-Haul, be clear about the following information. 1. I understand that this equipment must be returned to the same U-Haul location where it was rented. I understand t...
A.
To a free parking lot.
B.
To any U-Haul location.
C.
To where it was rented from.
D.
To the nearest U-Haul location.
【简答题】勤奋的,用功的,a.
【简答题】Before renting the equipment from U-Haul, be clear about the following information. 1. I understand that this equipment must be returned to the same U-Haul location where it was rented. I understand t...
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