问题 填空题

有A、B、C三种元素,已知A元素的原子核内没有中子;B元素的单质是一种气体,这种气体能供给呼吸;C元素的原子核外有2个电子层,其中第二个电子层的电子数是另一个电子层上电子数的2倍;D元素的原子失去1个电子后的电子排布与氖的电子排布相同.则A元素的单质的化学式是______,B元素的离子符号是______,C元素的名称是______,A、B形成化合物的化学式是______,B、C、D三种元素形成化合物的化学式是______.

答案

根据A元素的原子核内没有中子,可推断A为H;B元素的单质气体能供给呼吸,可推断B为O;C元素的原子核外有2个电子层,其中第二个电子层的电子数是另一个电子层上电子数的2倍,可知C元素的质子数为6,是碳元素;D元素的原子失去1个电子后的电子排布与氖的电子排布相同,可推知D为Na;由此可知:A元素的单质的化学式为:H2;B元素的离子符号是:O2-;C元素的名称是 碳;A、B形成化合物的化学式是:H2O;B、C、D三种元素形成化合物的化学式为:Na2CO3

故答案为:H2; O2-; 碳; H2O; Na2CO3

阅读理解

Friendships are some of the most important relationships that we will ever have in our lives. But how to build a solid friendship? Here are five tips for you.

Tip 1. _____

True friendships can only be built in honesty. This is more than just telling the truth. Being real and open about who you are and your thoughts and feelings are a part of building a solid friendship. If your “friends” don’t even really know you, who are they really friends with?

Tip 2. Shared Experiences

As you build your friendship, you will share many experiences together. Some of these may be great adventures or hard times that the two of you go through together. These shared experiences are things that you will laugh about, talk about, and cry about no matter how much time passes.

Tip 3. Sacrificial(牺牲精神的)love

Love is the basis(基础)of all solid relationships. I am not referring to the emotion(情感) of love, but to the action of love. Love is what will cause a friend to get out of bed in the middle of the night to help another. Love is what will put aside someone’s own wants to make sure that their friend is alright.

Tip 4. Understanding

When a friendship is solid, it will be based on each other’s understanding. You may not agree with everything that a friend says or does, but you will be able to put yourself into his or her shoes to begin to understand. Offering understanding to a friend is very important, as it allows them to feel that they have someone in their corner that they can talk to and who will offer advice and suggestions, without having to worry that if they don’t always follow it, the friendship will be lost.

Tip 5. Acceptance

A solid friendship is one in which two people accept one another, faults and all, for just who they are. There is no having to build up false excuses, or hide away the “dark secrets” from one another. We accept each other as whole, complete, and totally unique people.

小题1:What’s the best title of Tip 1?

A.Introduction of yourself.

B.Telling the truth

C.Honesty

D.True friendships小题2:Which tip can remind us of an English proverb “Love me, love my dog”?

A.Tip 2.

B.Tip 3.

C.Tip 4.

D.Tip 5.小题3:What’s the meaning of the underlined part “put yourself into his or her shoes” in Tip 4?

A.Exchange your shoes with his or hers.

B.Try on his or her shoes.

C.Put yourself in his or her position.

D.Force yourself.小题4:What’s the best title of the whole passage?

A.A solid friendship

B.The most important relationships

C.Five tips for you

D.Tips on how to build a solid friendship

单项选择题