热门试题:
[单项选择]
About fifty years ago, plant physiologists set out to grow roots by themselves in solutions in laboratory flasks. The scientists found that the nutrition of isolated roots was quite simple. They required sugar and the usual minerals and vitamins. However, they did not require organic nitrogen compounds. These roots got along fine on mineral inorganic nitrogen. Roots are capable of making their own proteins and other organic compounds. These activities by roots require energy, of course. The process of respiration uses sugar to make the high energy compound ATP, which drives the biochemical reactions. Respiration also requires oxygen. Highly active roots require a good deal of oxygen. The study of isolated roots has provided an understanding of the relationship between shoots and roots in intact plants. The leaves of the shoots provide the roots with sugar and vitamins, and the roots provide the shoots with water and minerals. In addition, roots can provide the shoots with organic
A. The relationship between a plant’s roots and its shoots.
B. What can be learned by growing roots in isolation.
C. How plants can be grown without roots.
D. What elements are necessary for the growth of plants.
[单选题]辨认犯罪嫌疑人时,被辨认的人数不得少于()人;对犯罪嫌疑人照片进行辨认的,不得少于()人的照片;辨认物品时,混杂的同类物品不得少于()件。
A.7,10,5
B.10,7,5
C.10,5,7
D.7,5,10
[单选题]信托公司应持续符合下列风险控制指标()。
A.净资产不得低于各项风险资本之和的40%,不得低于净资本的100%
B.净资产不得低于各项风险资本之和的100%,不得低于净资本的40%
C.净资产不得低于各项风险资本之和的40%,不得低于净资本的100%
D.净资产不得低于各项风险资本之和的100%,不得低于净资本的40%
[判断题]2.3推行机动车销售企业快捷代办的登记服务站代办进口车预登记的,可以由社会查验员查验车辆,由民警查验员通过查验监管系统复核确认。
A.正确
B.错误
[单选题]差压式液位计进行负向迁移后,其量程( )
A.变大
B.变小
C.不变
D.视迁移大小而定
[单选题]颅内无明显器质性改变的脑损伤是
A.脑挫裂伤
B.硬脑膜外血肿
C.硬脑膜下血肿
D.脑内血肿
E.脑震荡
[单选题]孔桩施工应首选非爆破法施工,当确需爆破时,宜采用浅眼松动爆破法,炮眼深度在硬岩层不超过()m,软岩层不超过()m,装药量不超过炮眼深度的三分之一。
A.0.4,0.7
B.0.5,0.8
C.0.4,0.8
D.0.5,0.7
[单项选择]柯氏位(CaldWell’s)摄片,中心线与听眦线夹角是()
A. 15°
B. 23°
C. 37°
D. 45°
E. 53°
[判断题]为检查管道及附件的强度而进行水压试验所选用的压力叫试验压力。( )
A.正确
B.错误
[多项选择]杆塔承受的可变荷载包括()。
A. 风和冰(雪)荷载
B. 导线、地线及拉线的张力
C. 安装检修的各种附加荷载
D. 结构变形引起的次生荷载
E. 各种震动动力荷载
F. 拉线或纤绳的初始张力
[判断题]装设接地线时,人体不得触及接地线,接好的接地线不得侵入未封锁线路的限界。
A.正确
B.错误
[判断题]太运[2010]54号文件规定过表列车应在《行车日志》后页记事栏中填记"过表"字样。
A.正确
B.错误
[多选题]下列关于地址转换的描述,正确的是()。
A.地址转换解决了因特网地址短缺所面临问题
B.地址转换实现了对用户透明的网络外部地址的分配
C.使用地址转换后,对IP包加长,快速转发不会造成什么影响
D.地址转换内部主机提供一定的“隐私”
E.地址转换使得网络调试变得更加简单
[单选题]血红蛋白的合成描述正确的是
A.以甘氨酸、天冬氨酸为原料
B.只有在成熟红细胞才能进行
C.与珠蛋白合成无关
D.受肾分泌的促红细胞生成素调节
E.合成全过程仅受ALA合酶的调节
[单项选择]某企业为增值税小规模纳税人,2011年6月对部分资产进行处理:销售废材料,由税务机关代开增值税专用发票,取得含税收入76000元;销售使用过的机器1台,取得含税收入64000元。该企业6月应缴纳增值税( )元。
A. 1 728.63
B. 2145.61
C. 3456.31
D. 4100.28
[单项选择]下列不包含在腕关节近侧腕骨的是()
A. 舟骨
B. 月骨
C. 三角骨
D. 豌豆骨
E. 头状骨
[判断题]泡沫灭火剂宜于扑救活泼金属火灾。()
A.正确
B.错误
[单选题]可直接在地面操作的断路器(开关)、隔离开关(刀闸)的操作机构应( )。
A.遮蔽
B.隔离
C.挂牌
D.加锁
[单选题]在同一电路中,当选择的参考点不同时,对任一点的电位和两点间的电压()
A.都无影响
B.只对电压有影响
C.只对电位有影响
D.都有影响
[单项选择]药品生产企业经过调查评价,对发现存在安全隐患的药品决定召回,属于()
A. 一级召回
B. 二级召回
C. 三级召回
D. 主动召回
E. 责令召回
[填空题]圬工桥—维修长度每米折合_______桥隧换算米;框构桥按圬工桥计算
[单项选择]油井出的水,按其来源可分为外来水和地层水,下列不属于地层水的是()。
A. 注入水
B. 夹层水
C. 边水
D. 底水
[多选题]灭火救援现场如何管控摄像员、宣传员、通信员等特殊人员行动安全?( )
A.按要求做好个人安全防护
B.单独行动
C.指定活动范围
D.不得冒险进入危险区域
[多选题]人民警察判明有()情形可以依法使用武器。
A.实施犯罪后携带枪支拒捕
B.实施犯罪后携带枪支逃跑
C.抢劫财物后逃跑
D.劫夺在押人犯
[单项选择]购买者有权利(但不是义务)按规定的利率,在某一特定日期或之前进行利率调期的合约是()。
A. 利率期权
B. 利率调期
C. 调期期权
D. 利率互换
[多选题]小红,16岁,因寻衅滋事罪被逮捕,公安机关侦查人员在对其讯问时,下列做法中错误的是:( )。
A.讯问时,应当有女工作人员在场
B.讯问时,是否需要有女工作人员在场视情形而定
C.讯问时,可以视情况决定是否通知其法定代理人到场
D.讯问时,小红的法定代理人到场。讯问笔录只需要交小红本人阅读,而无需交其法定代理人阅读。
[单选题]
在沟通过程中,所有传递于沟通者之间的,都是信息本身。
A.对
B.错
[单项选择]This factory will be closed until 11 am on 3 November due to essential reorganisation.A. They will close the factory on 3 November.B. They will move to a new factory on 3 November.C. They will open the factorv again on 3 November.
[多选题]下列对于发车的车机联控用语表述正确的是()。
A.××(次)×道出站(发车进路)信号好(了)。
B.××(次)××站×道出站(发车进路)信号好(了)。
C.××(次)×道出站(发车进路)信号好(了),反方向运行。
D.××(次)××站×道出站(发车进路)信号好(了),反方向运行。
[单项选择]采用硫代乙酰胺法检查重金属时,供试品如有色,在加硫代乙酰胺之前,对照溶液管中需加入()
A. 过氧化氢溶液
B. 稀焦糖溶液
C. 盐酸羟胺溶液
D. 抗坏血酸
E. 过硫酸铵
[单选题]0kV 电气设备不停电的安全距离是()米
A.0.35
B.0.6
C.0.7
D.1.5
[单项选择]EGC is a()part of INMARSAT-C.
A. component
B. supportable
C. combined
D. complimentary
[单项选择]甲和乙签订了买卖冰箱的合同,合同规定甲供应冰箱30台,乙付给甲共计3.9万元。供方于12月30日之前发货,一次交清,货到付款,如有违约要交1%的违约金。后来 12月30日甲交货之前就向乙索要货款,乙拒绝。因此甲拒绝交货。甲的行为是 ( )。
A. 行使同时履行抗辩权
B. 行使不安抗辩权
C. 违约行为
D. 行使先履行抗辩权
[单项选择]
Liberal (自由) education is becoming the task of teachers. It is (56) not only to teach and learn knowledge, but also to develop a person’s (57) . Its (58) is to teach each student to think for himself and make (59) decisions. Now liberal education has a great (60) on the world. Much work has been done to find better way of teaching.
In a liberal class, students are (61) to have their own thoughts and their own ideas when they have lessons which are often held in the form of (62) .They are properly guided to. (63) the knowledge learned. Punishment (64) exists. Teachers and students are just like (65)
The (66) is of course a perfect one if it can really be (67) . However, it only exists in the imagination and will never be (68) . We must (69) that children should at least be guided properly. Just close your eyes and think how many student
A. designed
B. required
C. refused
D. reported
[判断题]在民爆库房治安防范措施中,库房属于实体防范措施。( )
A.正确
B.错误
[判断题]装有催化剂的反应器、有填充物的大型压力容器全面检验每六年一次。
A.正确
B.错误