热门试题:
[单项选择]
"Salty" Rice Plant Boosts Harvests
British scientists are breeding a new generation of rice plants that will be able to grow in soil containing salt water. Their work may enable abandoned farms to become productive once more.
Tim Flowers and Tony Yeo, from Sussex University’s School of Biological Sciences, have spent several years researching how crops, such as rice, could be made to grow in water that has become salty.
The pair have recently begun a three-year programme, funded by the Biotechnology and Biological Sciences Research Council, to establish which genes enable some plants to survive salty conditions. The aim is to breed this capability into crops, starting with rice.
It is estimated that each year more than 100 hectares(公顷) of agricultural land are lost because salt gets into the soil and stunts(妨碍生长) plants. The problem is caused by several factors. In the tropics, mangroves(红树林) that create swamps(沼泽) and trad
A. to find ways to prevent water pollution
B. to identify genes that promote growth in salty soil
C. to breed rice plants that taste salty
D. to find ways to remove excessive salt from soil
[多项选择]心肌梗死超急性期心电图主要表现为()
A. 巨大高耸T波
B. 缺血型T波
C. 坏死型Q波
D. 单向曲线
E. 心律失常
[简答题]简述传播制度如何体现“全部社会结构和社会关系的复杂性”。
[判断题]母线槽距地面的距离不应小于2.2m,但安装在配电室、电气竖井等电气专用房间时不受此限制。( )
[多选题]which statements about restrictive immunity as following are correct?
A. The sovereign was completely immune from foreign jurisdiction in any case.
B. 1mmunity may be granted to governmental acts.
C. 1mmunity is not available for acts relating to private or trade activity.
D. Most states have accepted the restrictive immunity approach.
[单项选择]下列几种关于有机磷农药中毒的症状描述中,正确的是()。
A. 瞳孔缩小
B. 血尿
C. 全身水肿
D. 黏膜发绀
E. 以上都不是
[单选题]C64K型车辆各车门缝隙大于( )mm时调修。
A.4
B.6
C.8
D.10
[多选题]顺线路行走时,不准脚踏( )等。/*《南宁铁路局劳动安全守则》*/
A. 钢轨面
B. 道岔连接杆
C. 尖轨
D. 石砟
[单项选择]市场决定着一个创业项目()。
A. 能不能做
B. 如何做
C. 想不想做
[单选题]网络运营者对其员工应以( )为原则,保护儿童个人信息。
A.最大授权
B.最小授权
C.方便管理
D.简单操作
[判断题]断路器的额定短路开断电流远大于安装地点的母线短路电流,在开断短路故障后,禁止强送,并停用自动重合闸,严禁就地操作
A.正确
B.错误
[单项选择]
For years we have believed we were either healthy or sick. (55) , during the mid-90s, scientists developed a new concept called "sub-health", a status (56) health and illness. The concept of sub-health has become (57) because it has helped to explain many health problems. (58) one study, only 5. 6% of people in the overall population are actually sick, (59) the subhealthy group consists of about 60%, and the (60) population is considered healthy. (61) of one’s sub-health will help one to be alert to the underlying disease and remain healthy. Sub-health is a state in which the body is (62) turning from health to illness or from illness to health. Our bodies are actively (63) the conditions of health, sub-health and disease. Factors (64) aging, internal or external toxicity (毒性), and body or mind exhaustion may cause sub-health, but taking good care of the body can change a sub-
A. remaining
B. retaining
C. relating
D. reserving
[多项选择]如部分交易事项需要预付账款时,财务部、业务部门等应严格按照下述哪些规定执行?()
A. 加强预付账款和定金的授权批准制度
B. 预付账款和定金的支付必须由经办采购员填写《付款审批表》
C. 加强对大额预付账款的监控,定期对其进行追踪核查。
D. 如有特殊情况,可以不按照采购合同规定付款方式付款。
[单项选择]不属于进度控制中关注因素的是( )。
A. 监理施工情况
B. 设计变更
C. 劳动力安排情况
D. 气象条件
[填空题]行车工作必须坚持集中领导、()、逐级负责的原则。
[填空题]信号装置一般分为信号机和( )两类。J68
[单项选择]患儿女,4岁。患有特发性血小板减少性紫癜,活动时不慎磕碰,出现鼻出血。护士应做的紧急护理措施是()
A. 将患儿头后仰
B. 用凉水冲洗患儿额部
C. 捏住鼻子
D. 用浸有1%麻黄碱的棉球塞入鼻孔压迫止血
E. 服用止血药物
[单选题]消防联动控制器的故障指示灯点亮,表示检测到可能出现的外部设备故障或控制器本身故障,以下哪项( )不属于控制器本身故障。
A.模块故障
B.备电欠压
C.交流电断路
D.直接手动控制盘故障
[多选题]’年5月10日起实施的车辆分公司《危险源辨识、风险评价和风险控制管理细则》中规定,危险源辨识、风险评价和风险控制管理的具体工作内容有( )以及危险源辨识评价控制流程等。
A.危险源辨识管理
B.危险源辨识的方法管理
C.危险源风险评价管理
D.危险源风险控制
E.危险源及控制
[单项选择]初产妇,孕39周,近日来食欲增加,晚11点有腹部阵痛,一夜未睡,今晨7点就诊。精神疲乏,有宫缩,10~20秒/10~35分,宫缩时,宫壁不硬。肛查:先露头,半固定,宫口开指尖,前羊水囊不明显,坐骨切迹>2横指。应首选的处理措施是()。
A. 肥皂水灌肠
B. 催产素静滴
C. 人工破膜
D. 杜冷丁100mg肌注
E. 补液纠酸
[判断题]龙债券的发行人来自亚洲、欧洲、北美洲、南美洲,投资者主要来自亚洲的国家。( )
[单项选择]胆固醇不能转化成
A. 胆汁酸
B. 维生素D3
C. 睾丸酮
D. 雌二醇
E. 胆红素
[多项选择]用户可以设置以下哪些彩铃播放策略?()
A. 为不同主叫播放不同铃音
B. 为不同群组播放不同铃音
C. 在不同时段播放不同铃音
D. 随机播放铃音
[多选题] 晶体管的反馈分为()。[1.0分]
A. 动态反馈
B. 正反馈
C. 负反馈
D. 静态反馈
[判断题]公安机关应当及时将鉴定意见告知违法嫌疑人和被侵害人。
A.正确
B.错误
[判断题]采用电缆引入方式的以信号机械室为进线口附近室内开关箱中的电源端子分界。
A.正确
B.错误
[判断题]ILS进近程序,在仪表进近图上除应标明ILS进近的运行标准,还应标明GP不工作时的运行标准。
A.正确
B.错误
[单项选择]河南博物院位于()。
A. 农业路
B. 花园路
C. 金水路
D. 嵩山路
[单项选择]Woman: Protecting the environment should be on the agenda of every one of us.
Man: You took the words right out of my mouth.
Question: What did the man mean
A. He agreed with the woman.
B. He didn’t believe the woman.
C. The woman’s words hurt him.
D. The woman was talking nonsense.
[单项选择]《前赤壁赋》:“壬戌人秋,七月既望。”“既望”是指阴历()。
A. 十五
B. 十六
C. 十七
D. 十八
[多选题]细胞膜上的G蛋白( )。
A.由α、β和γ三个亚单位组成
B.α亚单位同时具有结台GTP或GDP的能力和GTP酶活性
C.结合GDP时为失活型,结合GTP后为激活型
D.激活的G蛋白分成三部分
[单选题]男、女新生儿在出生后( )天均可有乳腺肿大,似蚕豆或核桃大小,可有少量乳汁 分泌。
A. 4~5
B. 4~7
C. 5~7
D.6~8
[单项选择]甲、乙两种抗原都能与某一抗体发生特异性结合反应,这两种抗原相互称为()
A. 半抗原
B. 完全抗原
C. TD-Ag
D. TI-Ag
E. 共同抗原
[单选题]阀外水冷系统却塔检修接线端子应连接紧固,接触良好,绕组对地绝缘应不小于()MΩ(1004V兆欧表)
A. A.1
B.B.3
C.C.5
D.D.10
[判断题]顶板不好时,必须紧跟采煤机推移运输机。( )
A.正确
B.错误