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（14分）化学是研究物质的组成、结构、性质及变化规律的科学。 （1）①铜、②干冰、③氯化钠三种物质中，由离子构成的是 （填写序号，下同），可用于人工降雨的是 。 （2）食醋中含有醋酸（CH 3 COOH），醋酸由 种元素组成，其分子中氢、氧原子个数比为 。 （3）气体A和气体B接触可发生反应，生成固体C和液体D，其微观过程如下所示。 图1                                         图2 ① 该反应过程中，属于氧化物的是 （填名称）。 ② 将等体积的两只集气瓶中分别盛满A、B，如图2所示进行实验。已知相同条件下，气体的体积比等于分子个数比， 则充分反应后，剩余的气体是 （填化学式）。 （4）造纸会产生大量含NaOH的碱性废水，需经处理呈中性后排放。 ① 用pH试纸检测废水呈碱性的方法是 。 ② 若某造纸厂废水中含NaOH的质量分数为l.6%，现有废硫酸9.8t（H 2 SO 4 的质量分数为20%），可以处理的废水质量是多少？（写出计算过程）
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【单选题】某企业于20×3年1月1日从租赁公司租入一套设备,价值50万元,租期8年,租赁期满时预计残值6万元,归承租人所有。年利率6%,租赁手续费率1%。租金每年末支付一次,则每年的租金为( )元。已知:(P/A,7%,8)=5.9713。
A.
80517.89
B.
77361.06
C.
83733.86
D.
89244.76
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【简答题】When language is used to reveal the speaker’s a____ and feelings, such as “It’s very kind of you!”, it performs the e____ function.
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【多选题】The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。
A.
It provides dynamic neighbor discovery.
B.
It detects unreachable neighbors in 90 second intervals.
C.
It maintains neighbor relationships.
D.
It negotiates correctness parameters between neighboring interfaces.
E.
Ituses timers to elect the router with the fastest links as the designated router.
F.
It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
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【单选题】Conducting portion performs all of the following functions EXCEPT:
A.
conduct air
B.
exchange gases
C.
moisten ai r
D.
trap foreign particles
E.
warm air
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【单选题】以下关于二甲双胍的说法错误的是
A.
作用时间短，原形经肾脏排泄
B.
二甲双胍可以增加非胰岛素依赖的组织对葡萄糖的利用
C.
二甲双胍禁用于代谢性酸中毒患者
D.
二甲双胍可以减弱华法林抗凝作用
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【单选题】下列不属于数字信息技术应用的现象是()
A.
王某通过微信加好友进行社交活动
B.
李阿姨扫码骑走了一辆共享单车
C.
陈大伯将自家产的西红柿挑到集市上售卖
D.
雄光毛毯厂采用机器人对生产线进行质量筛查
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【多选题】The OSPF hello protocol performs which of the following tasks?（）
A.
It provides dynamic neighbor discovery
B.
It detects unreachable neighbors in 90 second intervals
C.
It maintains neighbor relationships
D.
It negotiates correctness parameters between neighboring interfaces
E.
It uses timers to elect the router witch the fastest links as the designated router
F.
It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
查看完整题目与答案
【多选题】THE APPLICATION LAYER OF THE TCP/IP MODEL PERFORMS THE FUNCTIONS OF WHAT THREE LAYERS OF THE OSI MODEL? (CHOOSE THREE.)
A.
application
B.
transport
C.
network
D.
data link
E.
physical
F.
session
G.
presentation
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【单选题】The last paragraph performs which of the following functions in the passage?
A.
It summarizes the discussion thus far and suggests additional areas of research.
B.
It presents a recommendation based on the evidence presented earlier.
C.
It discusses an exceptional case in which the results expected by the author of the passage were not obtained.
D.
It introduces an additional area of concern not mentioned earlier.
E.
It cites a specific case that illustrates a problem presented more generally in the previous paragraph.
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【单选题】Despite certain ______ habits of the North American screech owl, it performs the majority of its hunting alone, in alpine forests, unfettered by ______ .
A.
predatory... ecology
B.
instinctual ... behavior
C.
exogamous... kinship
D.
omnivorous... diet
E.
diurnal... darkness
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相关题目：
【单选题】某企业于20×3年1月1日从租赁公司租入一套设备,价值50万元,租期8年,租赁期满时预计残值6万元,归承租人所有。年利率6%,租赁手续费率1%。租金每年末支付一次,则每年的租金为( )元。已知:(P/A,7%,8)=5.9713。
A.
80517.89
B.
77361.06
C.
83733.86
D.
89244.76
查看完整题目与答案
【简答题】When language is used to reveal the speaker’s a____ and feelings, such as “It’s very kind of you!”, it performs the e____ function.
查看完整题目与答案
【多选题】The OSPF Hello protocol performs which of the following tasks (Choose two.)（）。
A.
It provides dynamic neighbor discovery.
B.
It detects unreachable neighbors in 90 second intervals.
C.
It maintains neighbor relationships.
D.
It negotiates correctness parameters between neighboring interfaces.
E.
Ituses timers to elect the router with the fastest links as the designated router.
F.
It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
查看完整题目与答案
【单选题】Conducting portion performs all of the following functions EXCEPT:
A.
conduct air
B.
exchange gases
C.
moisten ai r
D.
trap foreign particles
E.
warm air
查看完整题目与答案
【单选题】以下关于二甲双胍的说法错误的是
A.
作用时间短，原形经肾脏排泄
B.
二甲双胍可以增加非胰岛素依赖的组织对葡萄糖的利用
C.
二甲双胍禁用于代谢性酸中毒患者
D.
二甲双胍可以减弱华法林抗凝作用
查看完整题目与答案
【单选题】下列不属于数字信息技术应用的现象是()
A.
王某通过微信加好友进行社交活动
B.
李阿姨扫码骑走了一辆共享单车
C.
陈大伯将自家产的西红柿挑到集市上售卖
D.
雄光毛毯厂采用机器人对生产线进行质量筛查
查看完整题目与答案
【多选题】The OSPF hello protocol performs which of the following tasks?（）
A.
It provides dynamic neighbor discovery
B.
It detects unreachable neighbors in 90 second intervals
C.
It maintains neighbor relationships
D.
It negotiates correctness parameters between neighboring interfaces
E.
It uses timers to elect the router witch the fastest links as the designated router
F.
It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
查看完整题目与答案
【多选题】THE APPLICATION LAYER OF THE TCP/IP MODEL PERFORMS THE FUNCTIONS OF WHAT THREE LAYERS OF THE OSI MODEL? (CHOOSE THREE.)
A.
application
B.
transport
C.
network
D.
data link
E.
physical
F.
session
G.
presentation
查看完整题目与答案
【单选题】The last paragraph performs which of the following functions in the passage?
A.
It summarizes the discussion thus far and suggests additional areas of research.
B.
It presents a recommendation based on the evidence presented earlier.
C.
It discusses an exceptional case in which the results expected by the author of the passage were not obtained.
D.
It introduces an additional area of concern not mentioned earlier.
E.
It cites a specific case that illustrates a problem presented more generally in the previous paragraph.
查看完整题目与答案
【单选题】Despite certain ______ habits of the North American screech owl, it performs the majority of its hunting alone, in alpine forests, unfettered by ______ .
A.
predatory... ecology
B.
instinctual ... behavior
C.
exogamous... kinship
D.
omnivorous... diet
E.
diurnal... darkness
查看完整题目与答案
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