氯气有哪些性质？

阅读理解。

     Jennie and I met in night school. After having completed the required courses, we started teaching

in the same school. Frequently we had lunch together.

     For a time we were just casual friends, but one day, when I was telling Jennie about my problem

son, we discovered we were kindred spirits. "He's a difficult little character," I explained. Jennie looked

thoughtful, "Maybe you're seeing him with your eyes." She was silent a moment and then added softly,

"It is only with the heart that one sees rightly." I stared at her, "You're quoting that! It's from The Little

Prince, SaintExupery's book for children. One of my favorites. You know it, too?" Jennie nodded, "I

love it. I've read it so often, I've practically memorized it."

     Now, when I think of Jennie, I recall that book, because Jennie-more than anyone I know-possessed

the gift of seeing with the heart.

     From that moment of a treasured book shared, our friendship grew steadily. It wasn't that I didn't have an excellent relationship with my husband and son. But my mother had died shortly after my marriage, and I had neither sisters nor daughters. I realize, now, how I needed someone to share those little, seemingly

unimportant things that add so much to life-things that must be shared to be fully appreciated.

     And it was Jennie who helped me with my fourthgrade problem child. One day I_was_at_my_wit's__

end. "What he needs is a good beating!" I exploded.

     "He's probably had plenty of those," Jennie said. "Maybe he just needs sincere praise for anything he

does right, and a hug or two each day." I followed this suggestion, and eventually, because of Jennie, I

discovered a lovable little boy.

     Looking back, I had to admit that she taught me so much, such as how to love spring. One April day I said, "I hate rain!" And I'll never forget what she said, "You can't hate spring rain! It brings the flowers!" So I learned to love spring rain, too, because it did bring flowers-violets, tulips and daffodils.

1. What does the underlined sentence "I was at my wit's end" mean?

A. I didn't know what to do next.                      

B. I decided to give up.

C. I was hurt by my son deeply.                        

D. I was very proud of my son.

2. We learn from the passage that the author ________.

A. has the gift of seeing with the heart

B. likes spring rain because it seldom rains in spring

C. had lost her mother before her marriage

D. seldom praised her child in the past

3. How does the author feel about her family?

A. No one listened to her seemingly unimportant things.

B. She didn't get along well with her husband and son.

C. She seldom spoke to her mother.

D. She felt quite alone in her family.

4. The passage is mainly about ________.

A. how to educate children properly

B. the fact that we should see nature differently

C. the influence of friendship on our life

D. how friendship begins and develops

甲企业与乙银行签订借款合同，借款金额为10万元人民币，借款期限为1年，由丙企业作为借款保证人。合同签订3个月后，甲企业因扩大生产规模急需资金，遂与乙银行协商，将贷款金额增加到15万元，甲和银行通知了丙企业，丙企业未予答复。后甲企业到期不能偿还债务。该案中的保证责任应如何承担

A．丙企业不再承担保证责任，因为甲与乙变更合同条款未得到丙的同意

B．丙企业对10万元应承担保证责任，增加的5万元不承担保证责任

C．丙企业应承担15万元的保证责任，因为丙对于甲和银行的通知未予答复，视为默认

D．丙企业不再承担保证责任，因为保证合同因甲、乙变更了合同的数额条款而致保证合同无效

甲公司是一家化工生产企业，生产单一产品，按正常标准成本进行成本控制。公司预计下一年度的原材料采购价格为13元／公斤，运输费为2元／公斤，运输过程中的正常损耗为5％，原材料入库后的储存成本为1元／公斤。该产品的直接材料价格标准为（）元。

A.15

B.15.75

C.15.79

D.16.79

后滨

关于外阴炎组合正确的是（）.

A.滴虫 * * 炎—豆渣样 * * 分泌物

B.外阴 * * 假丝酵母菌病—黄白色泡沫 * * 分泌物

C.细菌性 * * 病—血性 * * 分泌物

D.萎缩性 * * 炎—匀质稀薄 * * 分泌物

E.宫颈癌晚期—米汤样 * * 分泌物