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【简答题】
酸雨是指pH＜5.6的雨、雪等各种形式的大气降水．某校化学兴趣小组同学，取到地面的酸雨水样，每隔一定时间测定其pH，数据如下： 测定时间（分钟） 0 1 2 3 pH 4.73 4.62 4.56 4.55 （1）从测定的数据可知；在测定的4分钟内酸雨水样的酸性是逐渐______（填“减弱”或“增强”）． （2）在测定的时间内，酸雨水样pH发生变化的主要原因是：酸雨中的亚硫酸（化学式是H 2 SO 3 ）被空气中的氧气氧化为硫酸的缘故．请写出反应的化学方程式：______．
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【单选题】听力原文：W: Show me your licence please? M: What is the matter? Did I do something wrong? W: You were speeding. M: I was speeding? W: You certainly were. Do you have any idea how fast you were going? M: I...
A.
He drove too fast.
B.
He didn't have a driving license.
C.
He car he drove was stolen.
D.
He drove in a residential area.
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【单选题】听力原文：W. What did you do on your vacation? M: I did farm work in the morning, went swimming every afternoon, and visited different families in the evening. W: Sounds like you kept yourself quite busy. ...
A.
In a big city.
B.
On a farm.
C.
In a factory.
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【单选题】( )规定了大型飞机公共航空运输承运人的安全管理体系。
A.
《民用航空中交通管理运行单位安全管理规则》（CCAR83）
B.
《一般运行和飞规则》（CCAR91）
C.
《大型飞机公共航空运输承人行合格审定规则》（CCAR121）
D.
《民用机场运行安全管理规定》（CCAR140）
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【判断题】根据第五次修订的《大型飞机公共航空运输承运人运行合格审定规则》规定,增加了乘务员初始训练和复训的时间。
A.
正确
B.
错误
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【简答题】图中,在最右边方框内的的阿拉伯数字1、2、3等表示该箱盒的接线 ,细线表示 。
查看完整题目与答案
【判断题】根据第五次修订的《大型飞机公共航空运输承运人运行合格审定规则》规定,降低了乘务员初始训练和复训的时间。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: What did you do during the earthquake, James? M: In the terrible earthquake, I stayed in bed. W: What do you mean? Didn't you try to get outside? M: No. I'd got terrible flu, so I just stayed ...
A.
He stayed in bed.
B.
He tried to get outside.
C.
He cried for help.
D.
He became mad.
查看完整题目与答案
【多选题】国民用航空局发布的《大型飞机公共航空运输承运人运行合格审定规则》(以下简称《规则》)P部分就机组成员( )作了明确定义。
A.
执勤期
B.
休息期
C.
休假
D.
飞行时间
查看完整题目与答案
【单选题】—Do you really know _____ at this time yesterday? — Sorry, I don't know. [     ]
A.
what did they do
B.
what they did
C.
what were they doing
D.
what they were doing
查看完整题目与答案
【多选题】牢牢掌握意识形态工作领导权,必须做到
A.
要旗帜鲜明坚持马克思主义指导地位
B.
要加快构建中国特色哲学社会科学
C.
要坚持正确的舆论导向
D.
要建设好网络空间
E.
要落实好意识形态工作责任制
查看完整题目与答案
相关题目：
【单选题】听力原文：W: Show me your licence please? M: What is the matter? Did I do something wrong? W: You were speeding. M: I was speeding? W: You certainly were. Do you have any idea how fast you were going? M: I...
A.
He drove too fast.
B.
He didn't have a driving license.
C.
He car he drove was stolen.
D.
He drove in a residential area.
查看完整题目与答案
【单选题】听力原文：W. What did you do on your vacation? M: I did farm work in the morning, went swimming every afternoon, and visited different families in the evening. W: Sounds like you kept yourself quite busy. ...
A.
In a big city.
B.
On a farm.
C.
In a factory.
查看完整题目与答案
【单选题】( )规定了大型飞机公共航空运输承运人的安全管理体系。
A.
《民用航空中交通管理运行单位安全管理规则》（CCAR83）
B.
《一般运行和飞规则》（CCAR91）
C.
《大型飞机公共航空运输承人行合格审定规则》（CCAR121）
D.
《民用机场运行安全管理规定》（CCAR140）
查看完整题目与答案
【判断题】根据第五次修订的《大型飞机公共航空运输承运人运行合格审定规则》规定,增加了乘务员初始训练和复训的时间。
A.
正确
B.
错误
查看完整题目与答案
【简答题】图中,在最右边方框内的的阿拉伯数字1、2、3等表示该箱盒的接线 ,细线表示 。
查看完整题目与答案
【判断题】根据第五次修订的《大型飞机公共航空运输承运人运行合格审定规则》规定,降低了乘务员初始训练和复训的时间。
A.
正确
B.
错误
查看完整题目与答案
【单选题】听力原文：W: What did you do during the earthquake, James? M: In the terrible earthquake, I stayed in bed. W: What do you mean? Didn't you try to get outside? M: No. I'd got terrible flu, so I just stayed ...
A.
He stayed in bed.
B.
He tried to get outside.
C.
He cried for help.
D.
He became mad.
查看完整题目与答案
【多选题】国民用航空局发布的《大型飞机公共航空运输承运人运行合格审定规则》(以下简称《规则》)P部分就机组成员( )作了明确定义。
A.
执勤期
B.
休息期
C.
休假
D.
飞行时间
查看完整题目与答案
【单选题】—Do you really know _____ at this time yesterday? — Sorry, I don't know. [     ]
A.
what did they do
B.
what they did
C.
what were they doing
D.
what they were doing
查看完整题目与答案
【多选题】牢牢掌握意识形态工作领导权,必须做到
A.
要旗帜鲜明坚持马克思主义指导地位
B.
要加快构建中国特色哲学社会科学
C.
要坚持正确的舆论导向
D.
要建设好网络空间
E.
要落实好意识形态工作责任制
查看完整题目与答案
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