题干

下列说法错误的是(   )

A:原子失去电子形成带正电的阳离子;钠原子和钠离子具有相同的质子数

B:洗洁精能洗去油污是因为它能溶解油脂;在水中加入蔗糖能增强溶液的导电性

C:光合作用可以将无机物转化为有机物;干电池可以将化学能转化为电能

D:有发热、发光现象的不一定是燃烧;酸碱中和后溶液不一定呈中性

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答案(点此获取答案解析)

B

同类题3

阅读下列短文,根据短文内容,从短文后各题所给的A、B、C、 D四个选项中,选择最佳选项。

SCENE I

One dollar a week

The doorway of the house where Chandler has a room. He is dressed in his best clothes, ready for his evening out. He is going out as his friend, Jeff White, comes in.

WHITE         What are you doing this evening, Towers?

CHANDLER      (Smiling) Tonight I'm going to live like a man with a million dollars!

WHITE         What are you talking about? You haven't got a million dollars!

CHANDLER      How much money are you and I paid each week, Jeff?

WHITE         Eighteen dollars. Why?

CHANDLER      And how much of that eighteen dollars do you spend each week?

WHITE         All of it, of course.

CHANDLER    Well, I don't. Each week I save one dollar out of my eighteen. Then, every ten weeks, I can buy myself an evening to remember.

WHITE         What do you do?

CHANDLER   I put on my finest clothes, go to one of the best restaurants in New York, eat the most expensive food on the menu, drink the best wine, and then take a taxi home!

WHITE          (Surprising) Why?

CHANDLER     Why? Because it makes me feel wonderful to sit with some of the richest people in America, and to make them think that I'm rich, too.

WHITE          You're crazy!

CHANDLER     (Laughing) Perhaps I am!

Mrs Black comes in.

MRS BLACK      Ah, Mr Chandler. I wanted to see you.

CHANDLER      Good evening, Mrs Black. What a lovely evening!

MRS BLACK   Lovely evening perhaps, but you haven't paid me for your room this month. When am I going to get the money?

CHANDLER     Soon, Mrs. Black. Very soon.

Mrs Black looks at Chandler's clothes.

MRS BLACK      You can spend money on expensive clothes, but you can't pay for your room. Is that right?

CHANDLER    (Hurrying away) Good night, Mrs Black!