They had just taken their seats, then __

临床上，感染经根尖孔引起牙髓的炎症称为（）

A.慢性牙髓炎

B.急性牙髓炎

C.可复性牙髓炎

D.逆行性牙髓炎

E.不可复性牙髓炎

全面检验前，待检容器人孔和检查孔打开后，必须清除所有可能滞留的易燃、有毒、有害气体。压力容器内部空间的气体含氧量应当在（）%（体积比）之间。

A.13～25；

B.15～18；

C.17～23；

D.23～29。

按照投资投入行为的直接程度，投资可分为直接投资和间接投资。（）是指投资者以其资本购买公司债券、金融债券或公司股票等，各种有价证券，以期获取一定收益的投资，由于其投资形式主要是购买各种各样的有价证券，因此也被称为证券投资。

A．无风险投资

B．直接投资

C．间接投资

D．风险投资

下列关于工程项目综合管理的论述中正确的是__________。

A．工程项目综合管理的目的是确保工程项目总体目标的顺利实现

B．工程项目综合管理的过程是一种有计划有秩序的静态管理过程

C．工程项目综合管理的过程只包括项目计划的制定和项目计划的实施

D．工程项目综合管理是把工程项目各阶段工作的具体目标和任务同管理目标结合在一起进行的综合管理

E．工程项目的综合管理必须建立在完善的项目管理制度的基础上

Charles liked music very much when he was at school, but (41) he went to the university he decided to study medicine (42) music. When he passed his examinations and became a doctor, he had to work in a hospital for (43) . There he discovered that a lot of patients were happier if (44) music was played for them. When Charles got an office and began to work (45) himself, he decided to (46) his patients happy by having a tape recorder in his waiting room play beautiful music for them.
But (47) the tape recorder had been put in(安装), Charles’ nurse heard a woman complain in the crowded (48) , "Here we’re (49) waiting to see the doctor, and he’s just playing (50) piano in his office instead of doing his work. \

[A]instead of[B]because of[C]in spite of