当样品的活度逐渐增大时,仪器测得的计数率增加与样品活度的增加不成比例。在超过最大计数

题型:单项选择题

问题:

当样品的活度逐渐增大时,仪器测得的计数率增加与样品活度的增加不成比例。在超过最大计数率之后,测得的计数率反而减少。这种现象与仪器的何种性能有关()

A.能量分辨率

B.计数率特性

C.空间分辨率

D.探测效率

E.固有分辨率

考点:江苏住院医师核医学Ⅱ阶段核医学练习题核医学练习题题库
题型:单项选择题

某产品按质量分为10个档次,生产第一档(即最低档次)的利润是每件8元,每提高一个档次,利润每件增加2元,但在相同的时间内产量减少3件.在相同的时间内,最低档的产品可生产60件.问在相同的时间内,生产第几档次的产品的总利润最大?有多少元?

题型:单项选择题

Money Matters for Students

GETTING A GRANT(补助)

Who pays?

The Local Education Authority (LEA) for the area in which the student is living.

Who can get this money?

Anyone who gets a place on a first degree course, although a student who has already attended a course of advanced further education may not. Students must also have been resident in the UK for at least three years, which can exclude (排除) some students from overseas.

SPECIAL CASES

If a student has worked before going to college:

A student who is 26 or more before the course starts and who has worked for at least three of the previous six years will get extra money--£155 a year if 26, increasing to a maximum of £615 at 29 or more.

If a student is handicapped (残疾的):

LEAs will give up to £500 to help meet extra expenses—such as buying a tape recorder for a blind student, extra heating or special food.

Banking:

Most of the big banks offer special services to students who open accounts (in the hope that they will stay with the bank when they become rich officials). A student won’t usually have to pay bank charges as long as the account stays in credit. Some banks allow students to overdraw by £100 or so, and still don’t make charges (though they do charge interest).

小题1:A student from Japan who has been staying in England for a year and intends to go to college in a few months will _________.

A.get money if he is taking a first degree course

B.be unable to get money from any LEA

C.get money from any LEA when he has finished his course

D.have to open a bank account before he gets any money小题2:Which of the following is TRUE?

A.A student already attending a course of advanced education is sure to get a grant.

B.A student aged 30 can get extra money—£615 a year.

C.A student usually must pay back charges when the account is in credit.

D.Students are allowed to overdraw by £100 or so in any bank.小题3:Why is it likely that a bank will welcome new students as their customers?

A.They know students receive money regularly.

B.They charge students extra.

C.They hope students will be rich in the future.

D.They need student accounts in term-time.小题4:Where can you probably read this passage?

A.A notice-board in a college.

B.A dictionary.

C.A newspaper.

D.A banking office.

题型:单项选择题

具有行气散结,降逆化痰功用的方剂是()

A.枳实消痞丸

B.金铃子散

C.半夏厚朴汤

D.天台乌药散

E.柴胡疏肝散

题型:单项选择题

认识目标客户就是要针对目标客户提供购前体验,明确客户范围,降低成本。同时还要对目标客户进行细分,对不同类型的客户提供不同方式、不同水平的体验。在运作方法上要注意信息由内向外传递的拓展性。()

题型:单项选择题

12CrMo12CrMoV钢的常温组织是()

A.铁素体

B.珠光体

C.铁素体+珠光体

更多题库