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【单选题】
下列函数在 上是减函数的是:
A.
y=
B.
y=
C.
y=
D.
y=
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参考答案：
举一反三
【单选题】除了视听味嗅触，人类还有一个非常重要的（）系统。
A.
情感
B.
通感
C.
内感
D.
伤感
查看完整题目与答案
【多选题】霾，主要指原因不明的因大量烟、尘等微粒悬浮而形成的浑浊现象。PM10是指空气中直径等于和小于10微米的颗粒物。根据目前的认识，机动车尾气排放、煤炭燃烧和工业生产的燃烧过程中排放的二氧化硫和氮氧化物等都是PM2.5的主要来源。它会对人的呼吸系统、神经系统等产生影响。 （2）“三效催化转换器”能将汽车尾气中的有毒气体转为无毒气体。图乙为其反应的微观示意图，下列说法正确的是 ( 选填序号）。
A.
该反应中原子发生重新组合
B.
该反应属于置换反应
C.
该反应能将引起 雾霾 的NO 2 和CO气体转化为N 2 和CO 2
查看完整题目与答案
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn't know where to spend it. He spoke to his friend Bill,'I 1 the hot weather, but I can't find a cool place in Ame...
查看完整题目与答案
【简答题】Mr. Li worked in a post office in Weihai. Last month he retired. His son works in America. Five years ago Mrs. Li went to America to look after their grandson. So Mr. Li decided to see them. Mr. Li wa...
查看完整题目与答案
【单选题】使用餐巾时,不可以用餐巾来( )。 A.擦嘴角的油渍 B.擦手上的油渍 C.擦拭餐具
A.
擦嘴角的油渍
B.
擦手上的油渍
C.
擦拭餐具
D.
以上均不可以擦拭
查看完整题目与答案
【单选题】Last month he promised that he ______ today, but he hasn't arrived yet.
A.
will come
B.
would have come
C.
would come
D.
is coming
查看完整题目与答案
【多选题】新能源汽车产业中的“三大”指的是()。
A.
电池
B.
电动机
C.
电控
D.
电助力
查看完整题目与答案
【判断题】使用餐巾时,不可以用餐巾来擦拭餐具( )。
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn’t know where to spend it. He spoke to his friend Bill,“I 1 the hot weather, but I can’t find a cool place in Ame...
查看完整题目与答案
【单选题】Joe liked hunting very much. Last month he came back from Africa and said that he would not go hunting any longer. He told me his experience as follows(如下). One morning I was walking in the forest and...
A.
hunting in Africa was terrible
B.
he had been hunting for a long time
C.
he had been hunting for a short time
D.
he had had a terrible experience
查看完整题目与答案
相关题目：
【单选题】除了视听味嗅触，人类还有一个非常重要的（）系统。
A.
情感
B.
通感
C.
内感
D.
伤感
查看完整题目与答案
【多选题】霾，主要指原因不明的因大量烟、尘等微粒悬浮而形成的浑浊现象。PM10是指空气中直径等于和小于10微米的颗粒物。根据目前的认识，机动车尾气排放、煤炭燃烧和工业生产的燃烧过程中排放的二氧化硫和氮氧化物等都是PM2.5的主要来源。它会对人的呼吸系统、神经系统等产生影响。 （2）“三效催化转换器”能将汽车尾气中的有毒气体转为无毒气体。图乙为其反应的微观示意图，下列说法正确的是 ( 选填序号）。
A.
该反应中原子发生重新组合
B.
该反应属于置换反应
C.
该反应能将引起 雾霾 的NO 2 和CO气体转化为N 2 和CO 2
查看完整题目与答案
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn't know where to spend it. He spoke to his friend Bill,'I 1 the hot weather, but I can't find a cool place in Ame...
查看完整题目与答案
【简答题】Mr. Li worked in a post office in Weihai. Last month he retired. His son works in America. Five years ago Mrs. Li went to America to look after their grandson. So Mr. Li decided to see them. Mr. Li wa...
查看完整题目与答案
【单选题】使用餐巾时,不可以用餐巾来( )。 A.擦嘴角的油渍 B.擦手上的油渍 C.擦拭餐具
A.
擦嘴角的油渍
B.
擦手上的油渍
C.
擦拭餐具
D.
以上均不可以擦拭
查看完整题目与答案
【单选题】Last month he promised that he ______ today, but he hasn't arrived yet.
A.
will come
B.
would have come
C.
would come
D.
is coming
查看完整题目与答案
【多选题】新能源汽车产业中的“三大”指的是()。
A.
电池
B.
电动机
C.
电控
D.
电助力
查看完整题目与答案
【判断题】使用餐巾时,不可以用餐巾来擦拭餐具( )。
A.
正确
B.
错误
查看完整题目与答案
【简答题】完形填空。 Mr. Smith works in New York. Last month he had a fif-day holiday, but he didn’t know where to spend it. He spoke to his friend Bill,“I 1 the hot weather, but I can’t find a cool place in Ame...
查看完整题目与答案
【单选题】Joe liked hunting very much. Last month he came back from Africa and said that he would not go hunting any longer. He told me his experience as follows(如下). One morning I was walking in the forest and...
A.
hunting in Africa was terrible
B.
he had been hunting for a long time
C.
he had been hunting for a short time
D.
he had had a terrible experience
查看完整题目与答案
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