1.选择题- (共11题)
选项 | 实验 | 现象 | 由现象所得结论 |
A | 将Cl2通入品红溶液 | 品红褪色 | Cl2具有漂白性 |
B | 向白色AgCl悬浊液中滴加0.1mol/LKI溶液 | 试管中白色沉淀转化为黄色沉淀. | Ksp(AgCl)>Ksp(AgI) |
C | 将CO2通入CaCl2溶液中 | 无明显现象 | 非金属性:Cl>C |
D | 用坩埚钳夹住一小块用砂纸仔细打磨过的铝箔在酒精灯上加热 | 熔化后的液态铝滴落下来 | 金属铝的熔点较低 |
氮化铝(AlN)是一种新型无机非金属材料.为了分析某AlN样品(样品中的杂质不与氢氧化钠溶液反应)中A1N的含量,某实验小组设计了如下两种实验方案.
已知:AlN+NaOH+H2O=NaAlO2+NH3↑
【方案l】取一定量的样品,用以下装置测定样品中AlN的纯度(夹持装置已略去).
选出不同类别的单词。
① {#blank#}1{#/blank#} A、dog B、bird C、colour
② {#blank#}2{#/blank#} A、yellow B、cat C、green
③ {#blank#}3{#/blank#} A、Mr. B、Ms. C、teacher
已知: +R′OH→
+HCl
(R、R′表示烃基)
2.单项选择- (共11题)
A./; the; the | B./; the; / | C.the; /; the | D./; /; the |
A.pained | B.injured | C.damaged | D.wounded |
A.armed | B.shouldered | C.handed | D.headed |
A.share my feelings | B.share my feelings between |
C.share with my feelings | D.share my feelings with |
A.losing; laying | B.missed; lying | C.missing; lying | D.lost; laying |
A.So as to make; heard | B.In order to make; hear |
C.To make; heard | D.In order that make; hear |
A.likely | B.probable | C.possible | D.perhaps |
A.the more beautiful | B.a most beautiful |
C. a much beautiful | D.a more beautiful |
A.increased by | B.increased to |
C.has increased to | D.has increased by |
A.Since | B.While | C.After | D.During |
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【1】题量占比
选择题:(11道)
单项选择:(11道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:11
7星难题:0
8星难题:0
9星难题:0