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The junior high school graduates have to take a P.E. test in many places around China. The full marks are usually 30 points and it means much in the senior high school entrance exam. In Nanjing, the test is held in April. Students have the test in their own schools. Each student is tested on three sports. They can choose long jump, basketball dribbling (运球) or volleyball. The pull-up is for boys and girls can choose the sit-up. Both boys and girls must skip in the test. Most students find the test easy and more than 90%of them can get full marks. That’s because they have been training for it during the three whole years. Students in Junior Three usually do lots of practice in P.E. classes. The training makes the test easier than it seems to be. Students in Nanjing don’t need to run a lot for the test, but students in Beijing must do lots of running for the test. Running is one of the sports in test. So in P.E. classes, they usually run a lot. Sometimes they have to run 3,000 meters in one class. Most teachers and parents welcome the P.E. test. They say it helps students build up their health. 小题1:The P.E. test in Nanjing includes all of these sports except __________. A.skipping B.basketball C.football D.volleyball 小题2:Students in Nanjing have the P.E. test in __________. A.spring B.Junior One C.autumn D.Junior Two 小题3:The underlined word “pull-up” means “__________” in Chinese. A.仰卧起坐 B.引体向上 C.俯卧撑 D.跳高 小题4:Which of the following is TRUE according to the passage? A.All the students must be tested on skipping in Nanjing. B.Few students in Nanjingcan get full marks in the P.E. test. C.Students in Beijing needn’t run during the test. D.Students in Nanjing should take part in four sports in the P.E. test. 小题5:What do most teachers and parents think of the P.E. test? _____________ A.It is difficult. B.It is easy. C.It is bad. D.It is good.
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举一反三
【单选题】下面有关Na 2 CO 3 与NaHCO 3 的叙述错误的是
A.
Na 2 CO 3 遇少量酸可转化为NaHCO 3
B.
在水中的溶解度Na 2 CO 3 比NaHCO 3 大
C.
与同浓度的硫酸反应时,Na 2 CO 3 比NaHCO 3 剧烈
D.
NaHCO 3 能与NaOH反应,而Na 2 CO 3 不能
【单选题】有关臭氧层破坏的说法,正确的是()。
A.
人类使用电冰箱、空调释放大量的硫氧化物和氮氧化物所致
B.
臭氧主要分布在近地面的对流层,容易被人类活动所破坏
C.
臭氧层空洞的出现,使世界各地区降水和干湿状况发生变化
D.
保护臭氧层的主要措施是逐步淘汰破坏臭氧层物质的排放
【单选题】以下是Na 2 CO 3 、NaHCO 3 的溶解度表及溶解度曲线,要除去NaHCO 3 固体中的少量Na 2 CO 3 ,应采用的物理方法是 [     ]
A.
冷却结晶
B.
蒸发结晶
C.
溶解过滤
D.
加适量盐酸
【判断题】结构相对数是在对总体分组的基础上,将部分数值与总体数值对比而得的比重或比率来反映总体内部组成状况的综合指标。()
A.
正确
B.
错误
【单选题】有关臭氧层破坏的说法,正确的是( )。
A.
人类使用电冰箱,空调释放大量的硫氧化物和氟氧化物所致
B.
臭氧主要分布在近地面的对流层,容易被人类活动所破坏
C.
臭氧层空调的出现,使世界各地区降水和干湿状况发生改变
D.
保护臭氧层的主要措施是逐步淘汰破坏臭氧层物质的排放
【简答题】溶解度:Na 2 CO 3 ______NaHCO 3 ,其原因是______。
【单选题】患者男,58岁。因外伤急诊入院,遵医嘱输血。在输血过程中出现溶血反应,其典型症状是
A.
四肢麻木,腰背部剧痛
B.
皮肤瘙痒
C.
呼吸困难,咳粉红色泡沫样血痰
D.
荨麻疹,胸闷
E.
手足抽搐,心悸
【简答题】溶解度:Na 2 CO 3 ______NaHCO 3 ,其原因为______。
【简答题】结构相对指标是在分组的基础上,将总体区分为不同性质的若干部分,以______对比求得的比重或比率,来反映总体内部的组成状况。
【简答题】以下是Na 2 CO 3 和NaHCO 3 的溶解度表及溶解度曲线。根据图表回答下列问题: (1) Na 2 CO 3 的溶解度曲线应为____(填“a' “ b”)。 (2)欲使接近饱和的Na 2 CO 3 溶液变饱和,可采用的方法是____________。(只写一种) (3)已知Na 2 CO 3 转化为NaHCO 3 的反应为Na 2 CO 3 +CO 2 +H 2 O=2NaHCO 3 ...
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