题干

化学与生活、生产密切相关,下列说法正确的是(  )

A:碳酸钡、碳酸氢钠、氢氧化铝均可作为抗酸药物使用

B:人体内的蛋白质不断分解,最终生成水和二氧化碳排出体外

C:工业生产玻璃和水泥,均需要用纯碱为原料

D:“地沟油”的主要成分是油脂,其组成与汽油、煤油不相同

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答案(点此获取答案解析)

D

同类题1

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

                                                                                                 Love and Friendship

    They are both so much related to each other. And both are so dissimilar!. What are the difference between friendship and love? Is platonic(柏拉图式的) friendship possible between persons of the opposite sex? Let us try and understand.

    What is friendship? Why do we call a person our friend? When do we call someone a very good friend? If we care for a person, if we are always ready to help that person and if we share most of our thoughts with a person, they are our good friends. ____ We are always sure that our friends will underst and why we acted in a certain way. 

____ The friendship is so deep and the relationship is so intimate, that most of the things automatically understood by our friends.

____ In a relationship of deep love, all the sharing that we discussed above is taken for granted. But love transcends(超出)all this. During love, we are attached with a particular person, while in friendship, one many have many friends. A loving relationship makes one so much attached to the other that one gets pained if his/her beloved is hurt! Love also involves a physical element.

____ This is a vital difference . Nature gives us love so that the species can go forward. Nature does not give us friendship.

Your heart beats will never increase in anticipation of meeting your friend. ____ You will not feel totally lost if you don’t meet your friend for a few days. You will not have dreams in your eyes thinking about your friendship.

A.You will not lie awake at night thinking about your friend.

B.What about love?

C.My answer is “Yes!”

D.Friendship does not have that.

E.We need not explain anything to our very good friends.

F.We can always count upon our good friends in an emergency.

G.The physical element may include hand in hand while walking.