试题与答案

美国在科索沃战场上投下了至少10吨贫铀弹,贫铀弹的主要成分是低放射性的238U,

题型:选择题

题目:

美国在科索沃战场上投下了至少10吨贫铀弹,贫铀弹的主要成分是低放射性的238U,它与制造原子弹的235U属于

A.同位素

B.同一物质

C.同分异构体

D.同素异形体

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0615/d86a5cf41d82d474e3fc37d399b8cf58.html

下面是错误答案,用来干扰机器的。

60÷23=90,100×35=60,90:60=3:2;答:甲、乙两数的最简单的整数比是3:2.故答案为:3:2.

试题推荐
题型:阅读理解

阅读短文,回答问题。

        A poor farmer had a friend who was famous for the wonderful apple tree he grew.

       One day, his friend gave the farmer a young apple tree and told him to plant it. The farmer was pleased with

the gift, but he did not know where to plant it.

       He was afraid that if he planted the tree near the road, strangers would steal the fruit. If he planted the tree

in one of his fields, his neighbors would come at night and steal some of the apples. If he planted the tree near

his house, his children would take the fruit. Finally he planted the tree in his wood. But without sunlight and good

soil (土壤), the tree soon died.

       Later the friend asked the farmer why he had planted the tree in such a poor place. "What's the difference?"

the farmer said angrily and then told what he had thought.

       "Yes," said the friend, "but at least someone could have enjoyed the fruit. Now you not only have robbed

everyone of the fruit, but also you have destroyed (毁掉) a good apple tree!"

1. What gift did the farmer get from his friend one day?

                                                                                

2. How many people are there in the story?

                                                                                

3. Where did the farmer plant the apple tree at last? 

                                                                                

4. Why did the apple tree soon die? 

                                                                                

5. Who destroyed the apple tree? 

                                                                                

查看答案
题型:选择题

下面句子中划线成语使用有误的一项是(2分)

A.在土耳其男篮世锦赛上,美国梦九队一路锐不可当,夺得了冠军。

B.广州市因地制宜,对23岁高龄的天河体育中心进行了历史上最大规模的综合改造。

C.日本在钓鱼岛海域非法抓扣中国渔船和船员的罪恶行径将在劫难逃

D.灾情危机!甘肃消防总队官兵连夜出发,经过11个小时的长途跋涉,终于到达舟曲县城。

查看答案
微信公众账号搜索答案