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试题答案

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    贵阳市七校2027届高二联合考试(一)1生物试题

6、贵阳市七校2027届高二联合考试(一)1地理试题


5、贵阳市七校2027届高二联合考试(一)1生物试题


阅读短文C，根据短文内容，从短文后面的选项中选出能填入空白处的最佳选项。选项中有一项为多余选项。
C
It’s half past three in the afternoon. 18 Look! Li Lei is playing basketball with his classmates. Some girls are watching them playing. They look very happy. Li Lei likes playing basketball.He thinks playing basketball is relaxing.And he is good at it. He is in the school basketball club. And he often teaches his classmates to play basketball. Liu Daming likes football. 19 Now he is practising playing football with his friends. He is running with the ball. Next week, they will have a football game, so they practise hard these days. Some students are taking a walk in the playground. 20 Some students are in the classroom. They are talking about their studies. The girl in red looks very happy. 21 What about the teachers Some of them are working in the office. And some are talking with their students. They are really nice teachers.
根据短文内容,从所给的A—E中选出能填入短文中空白处的最佳选项。(有一个多余选项)
A．She is reading a storybook.
B．What are they doing now
C．They are walking and talking happily.


7.What will Lily do next
A.Fix the broken box.
B.Explain to Mr.Green.
C.Apologize to the club.
听第7段材料，回答第8至10题。
8.What problem is the woman facing
A.Too many assignments.


3、贵阳市七校2027届高二联合 (一)1地理试题


5、贵阳市七校2027届高二联合考试(一)1物理试题


2、贵阳市七校2027届高二联合考试(一)1化学试题


5、贵阳市七校2027届高二联合考试(一)1政治试题


6、贵阳市七校2027届高二联合考试(一)1政治试题


3、贵阳市七校2027届高二联合考试(一)1 试题


B．n=3
C．第10 s时，X为1.5 mol，Y的浓度为0.25 mol·L－1
D．反应的热化学方程式为：X(s)＋3Y(g)Z(g)＋nW(g) ΔH＝－a kJ·mol－1
8．下图所示装置可用于制作简易的燃料电池。实验时，先接通开关K1，一段时间后断开开关K1，接通开关K2。下列说法正确的是
A．接通开关K1时，装置将化学能转化为电能
B．接通开关K1时，石墨电极b附近溶液碱性增强
C．接通开关K2时，溶液中Na+从石墨a处向石墨b处移动


A和B能够形成化合物F，其晶胞结构如图所示，晶胞参数a＝0.566 nm，F的化学式为________；晶胞中A原子的配位数为________；列式计算晶体F的密度________。
【答案】Na2O　8　≈2.27 g·cm－3
【解析】C的核外电子总数是最外层电子数的3倍，则C可能是Li或P，但是A、B、C、D原子序数依次增大，且B存在离子形式，所以C应为P，D的最外层只有一个未成对电子，且C、D同周期，所以D为Cl。A2－和B＋的电子层结构相同，则A为O，B为Na。由晶胞图知，小球有8个，大球有8×＋6×＝4，所以化学式为Na2O。小球为Na，大球为O。A为O，由晶胞结构知，面心上的1个O连有4个Na，在相邻的另一个晶胞中，O也连有4个Na，故O的配位数为8。1个晶胞中含有4个Na2O，根据密度公式有：ρ＝＝＝≈2.27 g·cm－3。
16．某离子晶体的晶胞结构如图所示，X位于立方体的顶点，Y位于立方体的体心。
(1)晶体中每个Y同时吸引着________个X，每个X同时吸引着________个Y，该晶体的化学式为________。
(2)晶体中在每个X周围与它最接近且距离相等的X共有________个。
(3)晶体中距离最近的两个X与一个Y形成的夹角∠XYX为________(填角的度数)。


3、贵阳市七校2027届高二联合考试(一)1化学答案