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【简答题】
当a为何值时，方程 x x-3 =2+ a x-3 无解？
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参考解析：
知识点：
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举一反三
【单选题】The scientist knew nothing about the matter, because he was always _________ himself in his study.
A.
burying
B.
devoting
C.
focusing
D.
concentrating
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【简答题】收到宏达公司前欠货款 100 000元,收到银行收账通知单。(2分)
查看完整题目与答案
【多选题】通过人口地理特征来细分旅游市场,可以根据( )标准来细分。
A.
行政区域
B.
都市统计区域
C.
电视网覆盖区域
D.
客源(主要影响)区域
查看完整题目与答案
【单选题】从2000名学生中按不重复抽样的方法抽取了100名进行调查,其中有女生45名,则样本成数的抽样平均误差为
A.
0.24%
B.
4.85%
C.
4.97%
D.
以上都不对
查看完整题目与答案
【单选题】Richard had trouble concentrating and learning in school because he was
A.
poor and hungry.
B.
distracted by Helene.
C.
lonely.
D.
unable to read.
查看完整题目与答案
【单选题】从2000名学生中按不重复抽样方法抽取了100名进行调查，其中有女生45名，则样本成数的抽样平均误差为(    )。
A.
0.24%    
B.
4.85%    
C.
4.97%    
D.
以上都不对
查看完整题目与答案
【单选题】A 25-year-old man comes to the psychiatrist with a chief complaint of depressed mood for 1 month. His mother, to whom he was very close, died 1 month ago, and since that time he has felt sad and been ...
A.
Major depression
B.
Dysthymia
C.
Posttraumatic stress disorder
D.
Adjustment disorder
E.
Uncomplicated bereavement
查看完整题目与答案
【单选题】He was concentrating so ______ on the chess game that he didn’t hear me enter the room.
A.
strongly
B.
powerfully
C.
intensely
查看完整题目与答案
【简答题】阅读理解。 I was concentrating on my work when my friend called me saying he was coming to visit me. After explaining where my new house was, I told him that I had left the key under the doormat, which hel...
查看完整题目与答案
【单选题】When I came in,he was ___his book.
A.
Concentrating on
B.
contributed on
C.
burying on
D.
Focused on
查看完整题目与答案
相关题目：
【单选题】The scientist knew nothing about the matter, because he was always _________ himself in his study.
A.
burying
B.
devoting
C.
focusing
D.
concentrating
查看完整题目与答案
【简答题】收到宏达公司前欠货款 100 000元,收到银行收账通知单。(2分)
查看完整题目与答案
【多选题】通过人口地理特征来细分旅游市场,可以根据( )标准来细分。
A.
行政区域
B.
都市统计区域
C.
电视网覆盖区域
D.
客源(主要影响)区域
查看完整题目与答案
【单选题】从2000名学生中按不重复抽样的方法抽取了100名进行调查,其中有女生45名,则样本成数的抽样平均误差为
A.
0.24%
B.
4.85%
C.
4.97%
D.
以上都不对
查看完整题目与答案
【单选题】Richard had trouble concentrating and learning in school because he was
A.
poor and hungry.
B.
distracted by Helene.
C.
lonely.
D.
unable to read.
查看完整题目与答案
【单选题】从2000名学生中按不重复抽样方法抽取了100名进行调查，其中有女生45名，则样本成数的抽样平均误差为(    )。
A.
0.24%    
B.
4.85%    
C.
4.97%    
D.
以上都不对
查看完整题目与答案
【单选题】A 25-year-old man comes to the psychiatrist with a chief complaint of depressed mood for 1 month. His mother, to whom he was very close, died 1 month ago, and since that time he has felt sad and been ...
A.
Major depression
B.
Dysthymia
C.
Posttraumatic stress disorder
D.
Adjustment disorder
E.
Uncomplicated bereavement
查看完整题目与答案
【单选题】He was concentrating so ______ on the chess game that he didn’t hear me enter the room.
A.
strongly
B.
powerfully
C.
intensely
查看完整题目与答案
【简答题】阅读理解。 I was concentrating on my work when my friend called me saying he was coming to visit me. After explaining where my new house was, I told him that I had left the key under the doormat, which hel...
查看完整题目与答案
【单选题】When I came in,he was ___his book.
A.
Concentrating on
B.
contributed on
C.
burying on
D.
Focused on
查看完整题目与答案