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【单选题】
听力原文:W: Hi, Mark! How's it going? M: Well, not so great. W: What's wrong? M: I've got a big problem with file poetry course that's required for my major. W: Is it all filled up? M: No, no. There's plenty of room, but there's prerequisite (前提条件). I've got to take Introduction to Poetry before I can take the special course in poets of the 1960's. And the introduction course is only offered in the evenings. W: You don't like evening classing? M: No, that's not the point. I work in the cafeteria every evening. I need the money to pay my tuition. W: Can't you ask someone at work to switch hours with you? Maybe you could just switch a couple of evenings, since the course probably only meets two times a week. M: I wish I could. My boss just did me a favor by putting me on evenings. And he'll hit the ceiling if I ask to change again. W: Wait a minute. I have an idea. Have you checked the courses over at the community college? They might offer an Introduction to Poetry during the day. M: That's a great idea. I'm free this afternoon. I think I'll go over and check it out. W: Yeah, their courses are actually a lot cheaper, and you can transfer the credits over here. M: Thanks for the advice, Linda. I'll let you know what happens. W: Sure, Mark. Good luck, (20)
A.
It's only open to poetry majors.
B.
It requires another class first.
C.
It's already full.
D.
It's only offered in the morning.
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【多选题】旋光度测定中应注意( )等问题。
A.
测定前后应以溶剂作空白
B.
对测定管注入供试液时,勿使发生气泡
C.
使用日光作光源
D.
配置溶液及测定时,温度均应在20±0.5℃
E.
读数三次,取平均值
【单选题】对于基本表EMP(ENO,ENAME,SALARY,DNO),其属性表示职工的工号、姓名、工资和所在部门的编号。基本表DEPT(DNO,DNAME)其属性表示部门的编号和部门名。有一SQL语句: SELECT COUNT (DI STINCT DNO)FROM EMP;其等价的查询语句是______。
A.
统计职工的总人数
B.
统计每一部门的职工人数
C.
统计职工服务的部门数目
D.
统计每一职工服务的部门数目
【单选题】给定如下 SQL 语句: SELECT employee.name, department.dname FROMdepartment,employee WHERE department.did=employee.did; 下面选项中,与其功能相同的是
A.
ELECT employee.name, department.dname FROMdepartment JOIN employee ON department.did=employee.did;
B.
SELECT employee.name, department.dname FROMdepartment CROSS JOIN employee ON department.did=employee.did;
C.
SELECT employee.name, department.dname FROMdepartment LEFT JOIN employee ON department.did=employee.did;
D.
SELECT employee.name, department.dname FROMdepartment RIGHT JOIN employee ON department.did=employee.did; di-language:AR-SA'>ELECT employee.name, department.dname FROMdepartment JOIN employee ON department.did=employee.did;
【单选题】在西门子PIC中,VW属于(C)
A.
B.
字节
C.
D.
双字
【判断题】流向单一、具有一定的和均匀的断面速度的气流组织方式,送入房间的气流充满整个洁净室断面,它像“活塞作用”那样把室内随时产主的灰尘压至下风侧,再把灰尘排至室外。由于这种方式是以要求室内断面上有一定风速为前提的,所以洁净室的净化空调系统开动后能立即(1min以内)达到稳定状态。
A.
正确
B.
错误
【单选题】在下列的SQL语句中,属于数据控制的是a、CREATE b、SELECT c、UPDATE d、GRANT e、DROPf、DELETE g、ALTER h、INSERT i、REVOKE
A.
di
B.
bcfh
C.
aeg
D.
aefg
【单选题】555定时器构成多谐振荡器需要几个电容?
A.
1
B.
2
C.
3
D.
不需要
【单选题】在西门子PIC中,VW属于()
A.
B.
字节
C.
D.
双字
【多选题】检查评定等级优良的条件有(    )和(    )。
A.
保证项目得满分
B.
分项检查表无零分
C.
汇总表得分80分以上
D.
汇总表得分70分
【单选题】题干: 下列说法正确的是:
A.
行动声号适用于互见中在航机动船当按本规则准许或要求进行操纵时
B.
行动声号仅适用于能见度良好,相遇两船为避免碰撞而采取行动时
C.
任何在航船舶,只要处于互见中,为避免碰撞而采取操纵行动时,就必须按规定鸣放操纵声号
D.
行动声号仅适用于任何能见度,相遇两船为避免碰撞而采取行动时
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