The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outside the actual deserts. Because of its very long, powerful legs and the floating effect of its extended wings, it is able to run at great speed over considerable distances.
The female ostrich normally produces about twenty eggs every rainy season. When the female ostrich begins to lay her eggs, however, she does not begin in her own nest. Instead she goes off in search of the nests of neighboring females and lays two or three eggs in each of them. By the time she has laid eight or nine eggs, she returns and lays the rest in her own nest.
Because of the size of the eggs, the female ostrich cannot lay more than one every two days, so it takes her three weeks to finish laying in her own nest. During that period, she spends a lot of time away from her nest looking for food. And while she is off her nest, other females visit it to lay their
A. it is a special kind of bird
B. it lives in large desert areas
C. it has special wings and legs
D. it is the largest bird in the world

查看答案

[单选题]章老师在和其他老师闲聊时说：“作为一名幼儿教师，形象好、会唱歌跳舞就够了，所以不必再投资时间和精力去学习其他知识了。更别提终身学习了。”该教师的说法()。
A.正确，教幼儿不需要太多精深的知识
B.不正确，教师需要不断增长为人师的真知
C.正确，章老师提到的东西完全够用
D.不正确，教师终身学习完全是为了个人能有更好的发展前途

查看答案

[单选题]牙周脓肿与牙槽脓肿的鉴别之一是牙周脓肿时
A.牙槽骨嵴吸收
B.脓肿范围弥散
C.牙髓多无活力
D.病程较长
E.叩痛重

查看答案

[填空题]S700K型电动转辙机的动作程序与ZD6型直流电动转辙机的动作程序大致相同，即：断表示→（） →转换→锁闭→给出另一位置表示。[322020101]

查看答案

[多选题]在立井井筒或倾角30度及其以上的井巷中,电缆应用()或其他夹持装置进行敷设。
A.夹子
B.卡箍
C.钢丝
D.吊钩

查看答案

[单选题]呼吸衰竭时,二氧化碳的潴留与下列哪项有关( )
A.每分钟静息通气量小于4L
B.通气/血流的比值小于0.8
C.通气/血流的比值大于0.8
D.通气/血流的比值等于0.8
E.弥散功能障碍

查看答案

[单选题]花的姹紫嫣红多来自
A..查儿酮
B..异黄酮
C..二氢黄酮
D..花色素
E..黄烷-3-醇

查看答案

[多选题]外单位工作票签发人对所派工作负责人和工作班人员是否适当充足以及施工作业的安全措施是否（）负责。
A.合格
B.正确
C.完备
D.完善

查看答案

[单选题]下列不是RA关节表现的是( )
A.晨僵
B.类风湿结节
C.关节肿胀
D.关节畸形

查看答案

[多选题]社会工作者老林负责某街道优抚对象关怀项目。为准确了解优抚对象的需要,老林运用一些量表评估优抚对象的现状,并去学校向老师了解优抚对象子女在学校的表现。上述资料收集过程中,老林采用的方法有（）。
A.访问法
B.观察法
C.文献分析法
D.实验法
E.问卷调查法

查看答案

[判断题]传统人事管理把人看作资源。

查看答案

[单项选择]菌血症（）
A. 血液中可查到细菌，无中毒症状
B. 血液中可查到病毒
C. 细菌毒素进入血液，并有中毒症状
D. 血液中查到大量细菌，并有严重中毒症状
E. 血液中大量化脓菌，并有多器官小脓肿

查看答案

[填空题]《高速铁路行车组织细则》（NCG/02-2018）规定列车运行中发现高铁区段防护栅栏内有闲杂人员．需进入防护栅栏处置时，应按规定向()申请上道作业。

查看答案

[单项选择]

On a weekday night this January, thousands of flag-waving youths packed Olaya Street, Riyadh’s main shopping strip, to cheer a memorable Saudi victory in the GCC Cup football final. One car, rock music blaring from its stereo, squealed to a stop, blocking an intersection. The passengers leapt out, clambered on to the roof and danced wildly in front of the honking crowd. Having paralyzed the traffic across half the city, they sped off before the police could catch them.
Such public occasion was once unthinkable in the rigid conformist kingdom, but now young people there and in other Gulf states are increasingly willing to challenge authority. That does not make them rebels: respect for elders, for religious duty and for maintaining family bonds remain pre-eminent values, and premarital sex is generally out of the question. Yet demography is beginning to put pressure on ultra-conservative norms.
After all, 60% of the Gulf’s native population is under the
A. The lower proportion of local youths in the workforce
B. More restrictions placed on the private firms in Saudi
C. Another reason for the difficulty in managing people pressure
D. The commitment to motivating youth participation in the task

查看答案

[单选题]在同一公差等级中，内螺纹中径公差比外螺纹中径公差大()，这是考虑内螺纹加工比外螺纹困难的缘故。
A.0.12
B.0.22
C.0.32
D.0.42

查看答案

[简答题]什么是锅炉的额定蒸发量和最大连续蒸发量？

查看答案

[单选题]450MHz频段双工与半双工的上下行频率间隔为( )MHz。
A.5.7
B.10
C.45

查看答案

[判断题]灰烬的证明作用主要是根据燃烧灰烬的表面特征及化学成分，识别是什么物质燃烧遗留下来的产物。
A.正确
B.错误

查看答案

[简答题]依照协议,以下哪些项可以是5G小区测量和上报的指标

查看答案

[单项选择]在支付手续费代销方式下，委托方确认销售收入的时间是( )。
A. 发出商品时
B. 签订代销协议时
C. 收到代销款时
D. 收到代销清单时