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[不定项选择题]共用题干
Where Has the Salt Come from?
Every now and then,we meet a fact about our earth that makes us feel strange and no
answer for the fact has yet been found.Such a fact is the existence of salt in the oceans.
How did it get there?
We simply do not know how the salt got into the ocean!We do know,of course,that
salt is water-soluble,and so passes into the oceans with rainwater.The salt of the earth's
surface is constantly being dissolved(溶解)and is passing into the ocean.
But we do not know whether this can explain the huge quantity of salt in oceans.If all
the oceans were dried up,enough salt would be left to build a wall 180 miles high and a
mile thick. Such a wall would reach once around the world at the Equator(赤道)!
The common salt that we all use is produced from seawater or the water of salt lakes,
from salt springs(源泉)and from deposits of rock salt. The concentration(浓度)of salt in
seawater ranges from about three percent to three-and-one-half percent. The Dead Sea,
which covers an area of about 340 square miles,contains about 11,600,000,000 tons of
salt!
On the average, a gallon(加仑)of seawater contains about a quarter of a pound of
salt.The beds of rock salt that are found in various parts of the world were all originally
formed by the evaporation(蒸发)of seawater millions of years ago. It is believed that the
thick rock-salt deposits were formed after about nine-tenth of theY volume of seawater had
been evaporated.
Most commercial salt is obtained from rock salt.The usual method is to drill wells(井)
down to the salt beds. Pure water is pumped down(抽进去)through a pipe. The water
dissolves the salt and it is forced through another pipe up to the surface.
The percentage of salt content in the Red Sea is higher than that in the Dead Sea.
A.Right
B.Wrong
C.Not mentioned
[多选题]处理上山巷道水灾时,应注意下列事项( )。
A.检查并加固巷道支护,防止二次透水、积水和淤泥的冲击
B.透水点下方要有能存水及存沉积物的有效空间,否则人员要撤到安全地点
C.保证人员在作业中的通信联系和退路安全畅通
D.指定专人检测风量和风流变化情况
[单项选择]一次出血不引起全身症状提示出血量小于()
A. 5ml
B. 50ml
C. 400ml
D. 600ml
E. 1000ml
[判断题]主压缩机真空指示器跳红表示滤芯状态良好。
A.正确
B.错误
[填空题] 水溶性维生素包括:B簇维生素和( )。
[判断题]2.79 夜间驾驶机动车,如果照明条件良好,无需开启前照灯。
A.正确
B.错误
[单项选择]强制性标准的强制作用和法律地位是由谁赋予的?()。
A. 国家有关法律
B. 企业
C. 行业
D. 地方
[多选题]喷漆工作时要戴好( )等防护用品。操作者应熟悉灭火器材的位置和使用方法。
A. A.口罩
B.B.手套
C.C.工作帽
[判断题]遇到大雾、大雨和六级以上的大风时,禁止高处作业。
A.正确
B.错误
[单选题]电网一次设备、二次设备状态信息数据,支持数据类型应满足()
A.GB/T 13749、DL/T 721
B.GB/T 13739、DL/T 721
C.GB/T 13729、DL/T 721
D.GB/T 13729、DL/T 722
[填空题]我国的年画产地很多,北方的年画代表是(),南方的年画代表是()。
[多项选择]建筑施工企业应当遵守有关环境保护和安全生产的法律、法规的规定,采取控制和处理施工现场()的措施。
A. 粉尘
B. 废弃物
C. 固体废物
D. 废水
E. 噪声、振动对环境的污染和危害
[单项选择]无菌纱条填塞宫腔止血时()
A. 36小时取出
B. 24小时取出
C. 12小时取出
D. 8小时取出
E. 16小时取出
[多选题]以下哪些是炸药化学变化的形式?( )
A. 融合
B. 燃烧
C. 爆轰
D. 热分解
[判断题](类别:号段管理难度:中等)jre是java开发工具包,是开发人员所需要安装的环境()
A.正确
B.错误
[填空题]Man lives in communities. His social existence restricts his (36) in certain directions and extends it in others. Society (37) on him some limitations. People do not all engage in the same activities. They can be (38) from each other by the functions they perform. This process of differentiation is called specialization. Specialization prevents many members of an industrial society from developing intelligence and (39) . But some aspects of human society extend them beyond a point which can be (40) by animals or animal communities lacking the features which human society (41) possesses.
Western-type (42) often claim that they provide "equality of opportunity" for all their citizens. At first sight it might seem that this implies the same chance for everyone of succeeding in his (43) occupation provided he is conscious of his goal and is willing to work hard. What the phrase actually implies is
[单选题]剪刀撑的设置宽度( )。
A.不应小于4跨,且不应小于6m
B.不应小于3跨,且不应小于4.5rn
C.不应小于3跨,且不应小于5m
D.不应大于4跨,且不应大于6m
[单选题]校本教研的核心要素是( )。
A.专业引领
B.同伴互助
C.自我反思
D.自我反思、同伴互助、专业引领
[填空题]T-2110为( )塔,上部为新型高效孔板( ),下部为17块( )。
[单选题] 防火墙 GE1/0/1 和 GE1/0/2 口都属于 DMZ 区域,如果要实现 GE1/0/1 所连接的区域能够
访问 GE1/0/2 所连接的区域,以下哪项是正确的?
A. 需要配置 Local 到 DMZ 的安全策略
B. 无需做任何配置
C. 需要配置域间安全策略
D. 需要配置 DMZ 到 Local 的安全策略
[简答题]根据消毒因子的适当剂量(浓度)或强度和作用时间对微生物的杀灭能力,可分为哪几种消毒方法?
[单项选择]征地区片价的确定和实施具有较强的政策性,应按照()要求组织听证,广泛听取有关部门、农村集体经济组织、农民群众及社会各方面的意见和建议。
A. 《农用地估价规程》
B. 《农用地定级规程》
C. 《国土资源听证规定》
D. 《农用地分等规程》
[多项选择]刺四缝疗法可用于治疗下列哪些疾病()
A. 疳证
B. 厌食
C. 积滞
D. 咳喘
E. 顿咳
[单选题]劳动力成为商品是货币转化为资本的前提条件,这是因为( )
A.货币所有者购买的劳动力能够带来剩余价值
B.资本家购买的是劳动力的价值
C.劳动力商品具有价值和使用价值
D.劳动力自身的价值能够在消费过程中转移到新的商品中去
[单项选择]包含()万个以上的元器件是超大规模集成电路。
A. 1
B. 10
C. 100
D. 1000
[单选题][单选题]当与调度所通信中断时,TDCS站机屏幕右下角表示灯()。
A. 亮红灯
B. 闪红灯
C. 亮绿灯
D. 闪绿灯
[单选题]A-B-001523
表面淬火的方法有火焰加热表面淬火和(
)表面淬火两种
A.均匀
B.感应加热
C.混合
D.、定点
[单项选择]After watching my mother deal with our family of five, I can’t understand why her answer to the question, "What do you do " is always," Oh, I’m just a housewife." JUST a housewife Anyone who spends most of her time in meal preparation and cleanup, washing and drying clothes, keeping the house clean, leading a scout troop, playing taxi driver to us kids when it’s time for school, music lessons or the dentist, doing volunteer work for her favorite charity, and making sure that all our family needs are met is not JUST a housewife. She’s the real Wonder Woman.
Why is it that so many mothers like mine think of themselves as second-class or something similar Where has this notion come from Have we males made them feel this way Has our society made "going to work" outside the home seem more important than what a housewife must face each day
I would be very curious to see what would happen if a housewife went on strike. Dishes would pile up. Food in the house would run out. No mea
A. critical
B. indifferent
C. ironical
D. appreciative
[多选题]继电保护、配电自动化装置、安全自动装置及自动化监控系统做传动试验或一次通电或进行直流系统功能试验前,应()后,方可进行。
A.通知运维人员
B.通知有关人员
C.通知工作票签发人
D.指派专人到现场监视
[单项选择]康复工程不包括()。
A. 假肢的生产、装配和应用
B. 轮椅的生产、装配和应用
C. 矫形器的生产、装配和应用
D. 助行器的生产、装配和应用
E. 无障碍设施的生产、装配和应用
[简答题]Conversation
Look at the note below.
You will hear a man calling to make arrangements.
Thursday, 11 November
Tasks
Ask Mr. Cruise, the IT 【1】, to network computers in the 【2】 division
Make appointment with Kevin on Friday at 【3】
Give Kevin a call to 【4】
[单项选择]检查湿度设定值,在空调控制面板检查,要求交换机房室内湿度设定值为50%,当湿度达到上限为80%和下限为()时有告警为正常。
A. 15%
B. 20%
C. 25%
D. 30%
[判断题]涉密人员本人或其直系亲属拟申请获得境外永久居留权.长期居留权或外国国籍的应当向单位报告。( )
A.正确
B.错误
[判断题]塑料安全帽的使用期间不超过三年。
A.正确
B.错误
[单选题]线路设备大修验收标准规定:弹条安装正确,符合要求,不符合标准的不超过( )%(连续检查100头),且无连续失效。
A.5
B.6
C.8
D.3
[单选题]从投资角度来看,本国基金投资于国际证券市场的目的是( )。
Ⅰ自由地选择投资地域和投资标的
Ⅱ把握不同区域的投资机会
Ⅲ最大化基金投资者利益
Ⅳ资产规模的扩大,能使基金管理公司以较少的单位成本获取较大的规模效益
A.Ⅰ、Ⅱ
B.Ⅰ、Ⅱ、Ⅲ
C.Ⅱ、Ⅲ、Ⅳ
D.Ⅰ、Ⅱ、Ⅲ、Ⅳ