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【简答题】
阅读理解。 When my mom said that we could adopt a couple of kittens (小猫),I was very excited. So off we went to the Humane Society where there were a lot of animals for __ 1 __. I noticed there was not a lot of __ 2 __ for the animals and not a lot of supplies to care for them.__ 3 __ they didn't have much,the people who worked there did their best for them.__ 4 __,it seemed they had just bare ly (几乎没有) enough food and medicine to keep the animals__ 5 __. When we started looking around,I saw a lot of animals and fell in__ 6 __with each of them.But my mother and I __ 7 __ settled on adopting two kittens we __ 8 __ Sox and Sierra.We went up to the front desk to __ 9 __the papers for them,and that's when I noticed a __1 0 __on the counter (柜台).The Humane Society was hoping to get enough __1 1 __to buy more supplies for the anim als and also __1 2 __a new building to help even more abandoned animals. We took our new kittens home,where they were __1 3 __to get a lot of love.Later that day,my mom and I went __1 4 __,and as we were walking through the parking lot at the store,I __1 5 __ a green piece of paper not far away from our car.So I walked over and __1 6 __ it up.It was a twenty-dollar bill! When I got home,I thought about what to __1 7 __it.Right then,Sox climbed up into my lap, and I knew the answer.I __1 8 __my mom to take me back to the Humane Society so that I could put the __1 9 __in the donation box.The lady at the counter smiled and thanked me, and I felt re ally __2 0 __about what I did. (     )1.A.information (     )2.A.care (     )3.A.Ever since (     )4.A.Otherwise (     )5.A.healthy (     )6.A.love (     )7.A.usually (     )8.A.expected (     )9.A.sell (     )10.A.bill (     )11.A.volunteers (     )12.A.design (     )13.A.sure (     )14.A.fishing (     )15.A.needed (     )16.A.turned (     )17.A.care for (     )18.A.asked (     )19.A.animal (     )20.A.nervous B.contribution B.room B.As if B.Therefore B.asleep B.touch B.gradually B.chose B.sign B.toy B.changes B.occupy B.willing B.swimming B.received B.showed B.do with B.forced B.service B.worried C.protection C.time C.Even though C.Then C.happy C.line C.finally C.met C.buy C.computer C.donations C.build C.surprised C.shopping C.recognized C.fixed C.get through C.reminded C.newspaper C.good D.adoption D.sight D.In case D.Still D.awake D.pride D.quickly D.named D.send D.box D.papers D.paint D.anxious D.cleaning D.noticed D.picked D.deal with D.promised D.money D.silly
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【单选题】H 3 PO 4 的pK a1 ,pK a2 ,pK a3 分别是2.12,7.20,12.40,当H 3 PO 4 溶液的pH=7.80时,溶液中的存在形式的浓度大小,正确的是()
A.
[H 2 PO 4 - ]>[HPO 4 2- ]
B.
[HPO 4 2- ]>[H 2 PO 4 - ]
C.
[H 2 PO 4 - ]<[HPO 4 2- ]
D.
[PO 4 3- ]>[HPO 4 2- ]
【单选题】H 3 PO 4 的pK a1 ,pK a2 ,pK a3 分别是2.12,7.20,12.40,当H 3 PO 4 溶液的pH=7.80时,溶液中的存在形式的浓度大小,正确的是( )
A.
[H 2 PO 4 - ]>[HPO 4 2- ]
B.
[HPO 4 2- ]>[H 2 PO 4 - ]
C.
[PO 4 3- ]>[HPO 4 2- ]
【单选题】用NaOH溶液滴定H 3 PO 4 溶液至pH = 4.7时,溶液的简化质子条件为 ( ) 。(H 3 PO 4 的pK a1 ~pK a3 分别是2.12、7.20、12.36)
A.
[H 3 PO 4 ] = [H 2 PO 4 - ]
B.
[H 2 PO 4 - ] = [HPO 4 2- ]
C.
[H 3 PO 4 ] = [HPO 4 2- ]
D.
[H 3 PO 4 ] = 2[PO 4 3- ]
【简答题】模拟视频监控产品相对数字产品有哪些优势?
【单选题】下列各句中的 “ 其 ” 不作人称代词的一项是( )
A.
共其乏困,君亦无所害
B.
既东封郑,又欲肆其西封
C.
君知其难也
D.
失其所与,不知
【单选题】H 3 PO 4 的 pK a 1 ~ pK a 3 分别为 2.12 , 7.20 , 12.4 。当 H 3 PO 4 的 pH = 7.80 时 ,下 述溶液中主要存在形式的浓度大小 , 正确的是 ( ) 。
A.
[H 2 PO 4 - ] > [HPO 4 2 - ]
B.
[PO 4 3 - ] > [HPO 4 2 - ]
C.
[HPO 4 2 - ] = [H 2 PO 4 - ]
D.
[HPO 4 2 - ] > [H 2 PO 4 - ]
【单选题】H 3 PO 4 的 pK q a 1 , pK q a 2 pK q a 3 分别为 2.12 、 7.20 、 12.36 ,当 pH=8.0 时, H 3 PO 4 溶液体系中浓度最大的组分是
A.
HPO 4 2-
B.
H 2 PO 4 -
C.
H 3 PO 4
D.
PO 4 3-
【多选题】启动能量回收的条件有哪些?
A.
加速踏板开度为0或制动
B.
电池电量低于百分之95
C.
动力电池温度小于45摄氏度
D.
各系统无故障
【简答题】高清数字视频监控系统的优势有哪些?
【单选题】H 3 PO 4 的 pK a1 , pK a2 , pK a3 分别是 2.12 , 7.20 , 12.40 ,当 H 3 PO 4 溶液的 pH=7.80 时,溶液中的存在形式的浓度大小,正确的是()。
A.
[H 2 PO 4 - ]>[HPO 4 2- ]
B.
[HPO 4 2- ]>[H 2 PO 4 - ]
C.
[HPO 4 2- ]>[H 3 PO 4 ]
D.
[PO 4 3- ]>[HPO 4 2- ]
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