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【单选题】
有三个关系R、s和T如下： 由关系R和S通过运算得到关系T，则所使用的运算为（ ）。A.
合并
B.
交
C.
广义笛卡尔积
D.
连接
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反馈参考答案：
举一反三
【单选题】患者女，60岁，因“咳嗽、咳痰20年，加重伴呼吸困难、发热1d”来诊。实验室检查：PaO 2 40mmHg，PaCO 2 80mmHg。该患者最可能的诊断是（）
A.
肺血栓栓塞症
B.
支气管扩张
C.
肺动脉高压，WHO心功能分级Ⅲ级
D.
慢性阻塞性肺疾病，Ⅰ型呼吸衰竭
E.
慢性阻塞性肺疾病，Ⅱ型呼吸衰竭
【单选题】According to Paragraph 4, Chris Bittman believes that
A.
endowment funds should be invested in business to make money.
B.
the endowment spending policies of American colleges should be reformed.
C.
school's policy of spending relies on its profits of endowment investment.
D.
the gap between rich schools and poor ones still remains.
【简答题】由块体和砂浆砌筑而成的结构叫（）。
【单选题】一般民用建筑常采用砖砌筑墙体、钢筋混凝土梁和楼板的结构形式,这类结构形式习惯上叫做混合结构或________。
A.
砖结构
B.
砖混结构
C.
钢结构
D.
钢筋混凝土结构
【单选题】Thanks to his father's________, the shy boy gradually built up his confidence and made great progress. [ ]
A.
destination
B.
ambition
C.
promotion
D.
inspiration
【单选题】6 Management reserves are normally defined as a % of the total budget. As a project progresses, the project manager wants the $ value of management reserve to _____, whereas the customer wants the man...
A.
Increase, increase.
B.
Increase, decrease.
C.
Decrease, decrease.
D.
Decrease, increase.
E.
Remain the same, return to customer
【简答题】Chris believes that volunteering is an important aspect of their ________________.
【单选题】around 20% of youngsters【C6】______best with background music,
A.
work
B.
relax
C.
think
D.
progress
【简答题】患者女，40岁。因SLE口服皮质激素近2年，发热2周伴咳嗽，痰中少量带血，查肺无异常体征，胸片右肺中野多发片状结节影伴空洞，血沉45mm／h，PPD5IU(-)。诊断首先考虑A、SLE肺部表现 B、浸润性肺结核 C、慢性纤维空洞性肺结核 D、支气管肺癌 E、结节病 对该患者PPD试验结果的解释哪项是错误的A、阳性表示结核感染 B、强阳性可支持结核诊断 C、阴性可排除结核病 D、弱阳性提示卡介苗交叉...
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