问题 填空题

下图A是一种用于显示事物异同点的信息处理方法.两个圆分别金钢石和石墨的有关信息,两个圆重叠的区域表示金钢石和石墨的共同特征,重叠区域以外的部分表示它们的独有特征.请你在下面的空格内填写与图B.图C中(1)、(2)、(3)区域对应的适当内容(每处只要求填一点).

(1)______;

(2)______;

(3)______.

答案

(1)氢气和一氧化碳都具有可燃性和还原性,密度都比空气小,

故答案为:可燃性(或还原性无色无味的气体)

(2)酸和碱都能使酸碱指示剂变色,也都可以和某些盐发生反应,

故答案为:都与指示剂反应(或都与某些盐反应)

(3)碱能够和非金属氧化物反应,而酸不会和非金属氧化物反应,比如:二氧化碳会和氢氧化钠反应,而不会和酸反应,故答案为:能与非金属氧化物反应

单项选择题
单项选择题

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop".

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) . She had only one small, flat bag with a few candies—fiftycent candies! I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

2()

A. little

B. less

C. enough

D. more