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（2）（2分）物质的量浓度均为0.1 mol/L的下列溶液pH 由大到小的顺序
（用序号表示）
①CH3COOH ②NH4Cl ③NaHCO3 ④Ba(OH)2 ⑤NaOH ⑥N a2CO3
(3)（2分）物质的量浓度相同的下列溶液按c(CO32－)由大到小的顺序是____________
①Na2CO3 ②NaHCO3 ③H2CO3 ④ (NH4)2CO3 ⑤NH4HCO3 查看习题详情和答案>>
根据下面一篇短文的内容判断下列句子的正误，正确的用“A”表示，错误的用“B”表示。
Vince is an officer in the navy(海军军官)．He is thirty-five years old．He lives on the sea(海洋)most of the time．
Last week．Vince went to a city for vacation．One evening，after he had supper, he decided to go to a movie．He got on a bus and stood by the door． More than ten minutes later, a drunk (醉汉) got on the bus．“Hey! Does the bus go to the zoo?”he asked Vince．
Vince said nothing and was going to the front．But the drunk caught hold of(抓住)him and went on asking，“This bus will take me to the zoo．won't it?”
Vince became angry and said，“Look carefully．I'm not a conductor，but an officer in the navy!”
Hearing this，the drunk spoke loudly，“Stop the ship, then! I want to take a bus!”
1.This story happened on the sea．
2.Vince took the bus to go to a zoo．
3.The underlined word“conductor”means “售票员”in the passage．
4.At last, the drunk thought he was in a ship．
5.We can learn from the passage that the drunk took the wrong bus．
查看习题详情和答案>>
根据下面一篇短文的内容判断下列句子的正误，正确的用“A”表示，错误的用“B”表示。
Vince is an officer in the navy(海军军官)．He is thirty-five years old．He lives on the sea(海洋)most of the time．
Last week．Vince went to a city for vacation．One evening，after he had supper, he decided to go to a movie．He got on a bus and stood by the door． More than ten minutes later, a drunk (醉汉) got on the bus．“Hey! Does the bus go to the zoo?”he asked Vince．
Vince said nothing and was going to the front．But the drunk caught hold of(抓住)him and went on asking，“This bus will take me to the zoo．won't it?”
Vince became angry and said，“Look carefully．I'm not a conductor，but an officer in the navy!”
Hearing this，the drunk spoke loudly，“Stop the ship, then! I want to take a bus!”
【小题1】This story happened on the sea．
【小题2】Vince took the bus to go to a zoo．
【小题3】The underlined word“conductor”means “售票员”in the passage．
【小题4】At last, the drunk thought he was in a ship．
【小题5】We can learn from the passage that the drunk took the wrong bus．
。请回答下列有关问题：（1）该同学并没有注射过乙肝疫苗，就此检验结果请你分析可能的原因是 。
（2）用图解表示乙肝病毒（含有DNA）感染人体过程中的遗传信息的流动方向： 。
（3）由乙肝病毒外壳蛋白制成的乙肝疫苗，注入机体之后，将作为__________物质，使__________被激活而增殖分化形成浆细胞和__________。
（4）该同学在踢足球时不小心被铁钉扎破了脚，及时注射了破伤风抗毒素进行治疗，已知破伤风杆菌可阻止神经末梢释放甘氨酸，因而能引起肌肉痉挛和惊厥
。据此分析甘氨酸相当于一种________，它能使下一个神经元的 信号向 信号转换过程受阻。
查看习题详情和答案>>
Vince is an officer in the navy(海军军官)．He is thirty-five years old．He lives on the sea(海洋)most of the time．
Last week．Vince went to a city for vacation．One evening，after he had supper, he decided to go to a movie．He got on a bus and stood by the door． More than ten minutes later, a drunk (醉汉) got on the bus．“Hey! Does the bus go to the zoo?”he asked Vince．
Vince said nothing and was going to the front．But the drunk caught hold of(抓住)him and went on asking，“This bus will take me to the zoo．won't it?”
Vince became angry and said，“Look carefully．I'm not a conductor，but an officer in the navy!”
Hearing this，the drunk spoke loudly，“Stop the ship, then! I want to take a bus!”
小题1:This story happened on the sea．
小题2:Vince took the bus to go to a zoo．
小题3:The underlined word“conductor”means “售票员”in the passage．
小题4:At last, the drunk thought he was in a ship．
小题5:We can learn from the passage that the drunk took the wrong bus．