高一数学集合问题，和高一英语间接引语和直接引语的转换问题。

2025-02-12 20:40:16

推荐回答（5个）

回答1：

1、能使A包含于(A与B的交集), 表明 A包含于B
只需 3≤2a+1≤X≤3a-5≤22
则3≤2a+1且3a-5≤22 算出a的范围

2.A={0，4}
而A与B的交集=B 则要求 B包含于A
1）B可以是空集，则二次方程无实数根，即判别式是小于零（以题目来看，无岁没有算但应该不用考虑这条，因为题目要算a的具体取值，而不是取值范围，我们根据判别式是小于零，只能列出不等式，则不行）
2）把x=1带入方程算出a，再考虑此时的将a带入：判别式是等于零的话，就可以取这个a；判别式是大于零的话，就看另一个根是不是4，若不是，这个a就不要
3）把x=4带入方程，同上

3.至少解对其中一题者有34+28-20-20=22人
两题均未解对者有50-20-22=6人

回答2：

数学：
1 、{a|1 ≤ a ≤ 9}
2 、a 的值为： 1， ≤-1
3 、（1）42
（2）8
英语：
1.Jane side whether Tom was you going to the library when he called you.

2.Paul's mother said that he should go to the hospital to see his uncle after class.

3.Perrier asked Tina that what he is looking for .

4.Rose said to her son that they would go out for a walk after dinner.

5.I asked Kaka wether he liked to go shopping with us.

6.The teacher told us that ice tunrns into water when it is over zero.

7.I asked him : "Will you stay at home or go to the cinema that night?"

8.He asked me :"when did you watch that movie?"

回答3：

1、能使A包含于(A与B的交集), 表明 A包含于B
只需 3≤2a+1≤X≤3a-5≤22
则3≤2a+1且3a-5≤22 算出a的范围{a|1 ≤ a ≤ 9}

2.A={0，4}
而A与B的交集=B 则要求 B包含于A
1）B可以是空集，则二次方程无实数根，即判别式是小于零，解得{a| a <-1}
2）把x=1带入方程算出a，再考虑此时的将a带入：判别式是等于零的话，就可以取这个a；判别式是大于零的话，就看另一个根是不是4，若不是，这个a就不要，解得a=±1
3）把x=4带入方程，a无解
所以{a|a=±1或 a <-1}

3.至少解对其中一题者有34+28-20=42人
两题均未解对者有50-42=8人

英语：
1.Jane side whether Tom was you going to the library when he called you.

2.Paul's mother said that he should go to the hospital to see his uncle after class.

3.Perrier asked Tina that what he is looking for .

4."We will go out for a walk after dinner."Rose said to her son.

5."would you like to go shopping with us?"I asked Kaka.

6."Ice tunrns into water when it is over zero,"the teacher told us.

7.I asked him : "Will you stay at home or go to the cinema that night?"

8.He asked me :"when did you watch that movie?"

回答4：

这题目出的，我以为问二者的关系呢

回答5：

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