下列何类骨盆易发生持续性枕后位?() A.均小骨盆 B.骨软化症骨盆 C.女型骨盆

题型:单项选择题

问题:

下列何类骨盆易发生持续性枕后位?()

A.均小骨盆

B.骨软化症骨盆

C.女型骨盆

D.男型骨盆

E.扁平骨盆

考点:广西妇产科住院医师规范化培训异常分娩异常分娩题库
题型:单项选择题

US teenagers may be facing a challenge (挑战) today. A recent survey suggests (表明) that they are less honest than previous generations (上一代人).

The survey was done among 29,760 students at 100 US high schools. The results suggest that in the past year, 30 percent of US high school students have stolen from a store. And 64 percent may have cheated on a test.

However, 93 percent of the students said they were satisfied (满意) with their honesty. And 77 percent said,“when it comes to doing what is right, I am better than most people I know.”

Some teachers were unhappy about the survey results. Some, however, defended (为……辩护) today’s students.

“The competition is greater and the pressures (压力) on kids have increased greatly,”said Mel Riddle, who was a high school teacher and headmaster for 40 years.“It is the pressures that make it easy for students to be dishonest.”

“I think these students are better than other generations,”he said.“I find them more active, better to work with and more thankful for support.”“ We have to create situations where it’s easy for kids to do the right things, ”he added.“We need to create classrooms where learning is more important than having the right answer.”

小题1:According to the survey, what challenge do US teenagers face today?

A.They have trouble getting pocket money

B.They don’t get along well with teachers

C.They are not so honest as older generations

D.They have too many tests to take each week小题2:We can learn from the survey that children in the US nowadays         .

A.behave worse

B.work harder

C.are less healthy

D.are busier at school小题3:According to the survey results,   _ percent of the students are satisfied with their honesty.

A.30

B.64

C.77

D.93小题4:What’s Mel Riddle’s opinion about the idea that students are dishonest?

A.He gets really angry about it

B.He thinks parents must do something to stop it

C.He thinks the students should change their behavior

D.He thinks there are some reasons for being dishonest小题5:What advice does Mel Riddle give on improving the honesty of students?

A.Do not let students do anything

B.Make it easier for them to learn

C.Ask students to find right answers

D.Give students more free time to have fun

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绳夹的使用数量应根据钢丝绳直径而定,但最少不得少于()。

A、3个

B、5个

C、2个

D、6个

题型:单项选择题

据报道,4月9日下午青海省西宁市纺织品大楼发生重大火灾,火灾造成1人死亡.

(1)纺织品大楼内存在许多可燃物质.下列物质属于可燃物质的是______(填序号)

①大理石板    ②保温泡沫塑料    ③陶瓷砖    ④棉麻纺织品

(2)据目击者说火灾的起因是大楼后面在电焊铁架子时而引发的.火灾中电焊铁架子为燃烧提供的条件是______(填序号).A.提供可燃物  B.使可燃物温度达到着火点    C.使可燃物与空气充分接触

(3)西宁市110报警台接到火灾报警之后,紧急从西宁、海东地区调集了500余名消防人员、43台消防车赶赴现场进行灭火和救援.两台大型挖掘机已经赶到火灾现场,将着火大楼的墙面掘开一个口,让救火的水能够进入楼内,进行彻底的扑火.此灭火过程中,水的主要作用是______.

(4)在第二批被救出的大楼工作人员中,有一个二十多岁的小伙子,他可能是因为吸入了过多的浓烟已经昏迷.为了防止在火灾中发生意外,火险时人们应______(填序号)

①用湿毛巾捂住口鼻    ②站立着跑离烟雾区    ③房间着火时立即打开窗户

(5)环氧丙烷(C3H5OH)主要用于生产保温材料、涂料等的重要原料.在氧气不足时,环氧丙烷燃烧会生成两种氧化物,一种常温下是液体,另一种是常见有毒气体.写出燃烧的化学方程式:______.

题型:单项选择题

美国的均势战略是霸权均势战略。

题型:单项选择题

骨骼肌细胞动作电位升支形成的原因是

A.Na+内流
B.Cl-内流
C.Ca2+内流
D.K+内流
E.K+外流

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