热门试题:
[单项选择]
In recent years a new farming revolution has begun, one that involves the (21) of life at a fundamental level—the gene. The study of genetics has (22) a new industry called biotechnology. As the name suggest, it (23) biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to (24) seeds that give a high yield, that (25) diseases, drought and frost, and that reduce the need for (26) chemicals. If such goals could be achieved, it would be most (27) . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain (28) . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, (29) usually involves taking genes from one species and inserting them into another (30) to transfer a de
A. hatch
B. train
C. duplicate
D. patent
[单选题]现场检修作业过程中，搭设脚手架作业不需要开具（ ）。
A.检维修作业许可证
B.检维修作业分析表
C.高处作业许可证
D.检维修管线打开作业票
[单项选择]不合法的main函数命令行参数表示形式是( )。
A. main (int a，char*c[1])
B. main (int arc, char**arv)
C. main (int argc, char*argv)
D. main (int argy, char*argc[])
[单项选择]
W: Well, Mr. Steve, we have had an interesting discussion about your work. Now, tell us something about your after work activities.
M: I guess not much different from everyone else. I’m fond of sports, and I run about 3 miles every day. I particularly enjoy cross-country running, where you have to run across fields, jump over streams and so on. While I’m running I think about all kinds of things, and I can become more healthy. Next year I’m going to try the London Marathon. It’s a long, hard race-26 miles, or 42 kilometers and you have to be tough to finish, but I want to do it very much. I worry a bit about getting old, and I’d like to prove to myself that I’m still almost as well as I was twenty years ago. I’m interested in climbing as well as running. I’ll never become an expert climber, but I know what I’m doing in the mountains. I successfully completed a course in snow and ice climbing when I was younger, and I&r
A. Training for a professional athlete.
B. His physical training.
C. How to do cross-country running.
D. How to do mountain climbing.
[判断题]在生产过程中,发现安全防护装置对操作带来不方便,可以不用或者拆除。
A.正确
B.错误
[单选题]超声波探伤仪中，产生高压脉冲以激发探头工作的电路单元叫做（ ）。
A.放大器
B.接收器
C.脉冲发射器
D.同步器
[单选题]《国家安全法》所界定的“国家安全”不包括（ ）。
A.文化安全
B.个人隐私安全
C.生态安全
D.核安全
[填空题]DK-1型电空制动机“空气位”操作时,机车制动后的单独缓解依靠下压（ ）手柄实现。
[单选题]A-C-F-022 4 2 3
混凝土外观检查中,2m长度上表面平整检查允许偏差为( )。
A.15mm
B.10mm
C.8mm
D.5mm
[判断题]布森提出了事故是一种不正常的或不希望的能量释放,意外释放的各种形式的能盘是构成仿害的直接原因。( )
A.正确
B.错误
[不定项选择题]蒋先生，48岁，身高175Cm，体重80kg，投资公司经理。工作紧张压力大，几乎每天都长时间坐着看书，缺乏运动，吸烟，每天蔬菜水果摄入充足，父亲冠心病史，近期常常感觉头晕，血压155／90mmHg，总胆固醇5. 09mmol／L。甘油三酯l. 75mmol／L，空腹血糖6. 3mmol／L，现到健康管理中心咨询。
蒋先生的风险等级是( )。
A.理想风险
B.目标风险
C.高风险
D.中风险
E.低风险
[单项选择]一种税区别于另一种税的主要标志是（）。
A. 税率
B. 征税对象
C. 征税范围
D. 税目
[多选题]不同的发展阶段因业务发展的需要采取不同的（）以及所面临的不同监管环境所采取的差异经营策略带来潜在洗钱风险与所选择风险控制策略相互关联互为因果。
A.发展客户策略
B.产品策略
C.市场策略
D.地域策略
[多项选择]在下列中国传统名茶中，属于红茶的有：
A. 水金龟
B. 滇红
C. 大红袍
D. 铁罗汉
E. 祁红
[单选题]细菌性食物中毒的发病机制主要与下列哪项因素有关（）
A.患者的胃肠功能
B.细菌及毒素
C.未及时使用抗生素
D.人体的抵抗力
E.进食量的多少
[判断题]观察技巧主要有重复观察、动态观察两种。( )
A.正确
B.错误
[多选题]国家公职人员信用贷款用途包括（ ）。
A.购房、建房及房屋装修
B.汽车、旅游等其他消费
C.培训支出
D.股票购买
E.炒房
[单选题]护士需要帮助人群解决与健康相关的问题,以下哪一项不确切
A.减轻痛苦
B.维持健康
C.保护人类
D.促进健康
[判断题]教育费附加的计征,以当月入库的增值税、消费税税款为依据,不包括当月缴纳的属于以前月度的税款 。
A.正确
B.错误
[多选题]编制人工定额时,属于工人工作必须消耗的时间有( )
A.基本工作时间
B.辅助工作时间
C.违背劳动纪律损失时间
D.准备与结束工作时间
E.不可避免的中断时间
[单项选择]胃癌的好发部位是
A. 贲门部
B. 幽门部
C. 胃大弯
D. 胃小弯
E. 胃窦部
[单选题]At that moment she was standing a few meters away from __________ we are now.
A.where
B.what
C.which
D.there
[单选题] 省公司级单位应( )召开一次安全监督例会。
A.每月
B.每季度
C.每半年
D.每年
[单选题]《国家电网有限公司输变电工程施工分包安全管理办法》规定，专业分包商对所承担的施工项目必须按照要求编制施工方案。对于危险性较大的（）施工作业，施工承包商应进行安全技术交底。
A.分包工程
B.专业分包
C.单位工程
D.关键工序
[多项选择]影响灌浆压力的因素有（）。
A. 孔深
B. 岩层性质
C. 灌浆段上有无压重
D. 浆液的浓度
E. 岩层的吸浆量大小
[判断题]作业负责人在确认作业环境、作业程序、安全防护设备、个体防护装备及应急救援设备符合要求后，方可安排作业人员进入有限空间作业。
A.正确
B.错误
[判断题]我国民族关系中的“三个离不开”是指汉族离不开少数民族，少数民族离不开汉族，少数民族之间也相互离不开。
A.正确
B.错误
[多选题]线路设备大修应按设计文件及表6.4.1相关项目进行验收，主要项目（ ）一次达到标准，可评为“优良”。
A.轨道几何尺寸
B.线路锁定
C.道床清筛
D.捣固质量
[单项选择]
Black Holes
Most scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密). This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.
Although black holes do exist, they are difficult to observe. These are the reasons.
·No light or anything else comes out of black holes. As a result, they are invisible to a telescope.
·In astronomical terms, black holes are truly tiny. For example, a black h
A. Right
B. Wrong
C. Not mentioned
[判断题]转子流量计适于较洁净的流体、大流量的测量。( )
A.正确
B.错误
[单选题] 男性,45岁,着凉后右侧腰部臀部、股后部及小腿外侧疼痛就诊。检查坐骨神经沿途部位有压痛,踝反射存在,但无相应关节活动,属于
A.Kernig征;
B.Lasegue征;
C.Brudzinski征;
D.Babinski征;
E.Gordon征;
[单项选择]短时记忆容量有限，为了使其包含更多的信息，可采用的方法是( )。
A. 感觉
B. 注意
C. 组块
D. 复述
[单选题]高压配电（含相关场所及二次系统）工作，与邻近带电高压线路或设备的距离大于表3-1规定，应填用配电第二种工作票。
A.正确
B.错误
[简答题]物资发放必须执行“（Q），交旧领新、一单一料”制度。
