题目内容

某学生在军训时进行打靶测试,共射击10次。他的第6、7、8、9次射击分别射中9.0环、8.4环、8.1环、9.3环,他的前9次射击的平均环数高于前5次射击所得的平均环数。若要使10次射击的平均环数超过8.8环,则他第10次射击至少应该射中( )环(报靶成绩精确到0.1环)。()

A. 9.0
B. 9.2
C. 9.4
D. 9.5
E. 9.9

查看答案
更多问题

某条高速公路全长80km,路段上有6个互通立交,并有1.8km和2.1km的长隧道两座。根据提供的交通量,两个隧道都设计有通风、照明及隧道变电所,并有完整的交通安全设施、监控系统及通信系统。该路设有一处监控分中心,能实现隧道变电所无人值守,能和省监控中心实现联网互传信息,以及为运营管理提供信息。 根据此案例场景,回答下列问题: 缆索护栏属于( )。

A. 刚性护栏
B. 半刚性护栏
C. 柔性护栏
D. 一般护栏

Read the following text. Choose the best word or phrase for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. With Airbus’s giant A380 airliner about in to take to the skies, you might think planes could not get much bigger — and you would be right. For a given design, it turns (21) , there comes a point where the wings become too heavy to generate (22) lift to carry their own weight. (23) a new way of designing and making materials could (24) that problem. Two engineers (25) University College London have devised an innovative way to customise and control the (26) of a material throughout its three-dimensional structure. In the (27) of a wing, this would make possible a material that is dense, strong and load-bearing at one end, close to the fuselage, (28) the extremities could be made less dense, lighter and more (29) . It is like making bespoke materials, (30) you can customise the physical properties of every cubic millimetre of a structure. The new technique combines existing technologies in a(n) (31) way. It starts by using finite-element-analysis software, of the type commonly used by engineers, (32) a virtual prototype of the object. The software models the stresses and strains that the object will need to (33) throughout its structure. Using this information it is then (34) to calculate the precise forces acting on millions of smaller subsections of the structure. (35) of these subsections is (36) treated as a separate object with its own set of forces acting on it — and each subsection (37) for a different microstructure to absorb those local forces. Designing so many microstructures manually (38) be a huge task, so the researchers apply an optimisation program, called a genetic algorithm, (39) This uses a process of randomization and trial-and-error to search the vast number of possible microstructures to find the most (40) design for each subsection.

A. stand
B. sustain
C. understand
D. withstand

Read the following text. Choose the best word or phrase for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. With Airbus’s giant A380 airliner about in to take to the skies, you might think planes could not get much bigger — and you would be right. For a given design, it turns (21) , there comes a point where the wings become too heavy to generate (22) lift to carry their own weight. (23) a new way of designing and making materials could (24) that problem. Two engineers (25) University College London have devised an innovative way to customise and control the (26) of a material throughout its three-dimensional structure. In the (27) of a wing, this would make possible a material that is dense, strong and load-bearing at one end, close to the fuselage, (28) the extremities could be made less dense, lighter and more (29) . It is like making bespoke materials, (30) you can customise the physical properties of every cubic millimetre of a structure. The new technique combines existing technologies in a(n) (31) way. It starts by using finite-element-analysis software, of the type commonly used by engineers, (32) a virtual prototype of the object. The software models the stresses and strains that the object will need to (33) throughout its structure. Using this information it is then (34) to calculate the precise forces acting on millions of smaller subsections of the structure. (35) of these subsections is (36) treated as a separate object with its own set of forces acting on it — and each subsection (37) for a different microstructure to absorb those local forces. Designing so many microstructures manually (38) be a huge task, so the researchers apply an optimisation program, called a genetic algorithm, (39) This uses a process of randomization and trial-and-error to search the vast number of possible microstructures to find the most (40) design for each subsection.

A. is to
B. should
C. would
D. has to

案例分析题女性,35岁,因多食,肥胖,闭经,血糖高1年就诊,体检:身高160cm,体重75kg,腹部,臀部脂肪堆积,紫纹(+),血压:170/100mmHg,血糖10.1mmol/L,诊皮质醇增多症。 病人于手术后1年随诊,下述哪种情况不支持治疗有效()

A. 向心性肥胖减轻
B. 月经恢复
C. 空腹血糖6.8mml/L
D. 血压,150/90mmHg
E. 血皮质醇早8点510mmol/L(正常165~441mmol/L),下午4点480mmol/L

答案查题题库