凡是脱氧元素，不论它是在钢液中，还是在渣中，都（）脱硫。

( )辞职率低。

A．工资水平低的较工资水平高的

B．男性劳动力较女性

C．年轻人较年长者

D．经济繁荣时期较萧条时期

It’s not easy being a teenager（13至19岁青少年）—nor is it easy being the parent of a teenager. You can make your child feel angry, hurt, or misunderstood by what you say without realizing it yourself. It is important to give your child the space he needs to grow while gently letting him know that you you’ll still be there for him when he needs you.

Expect a lot from your child, just not everything. Except for health and safety problems, such as drug use or careless driving; consider everything else open to discussion. If your child is unwilling to discuss something, don’t insist he tell you what’s on his mind. The more you insist, the more likely that he’ll clam up. Instead , let him attempt to solve（解决）things by himself. At the same time, remind him that you’re always there for him should he seek advice or help. Show respect for your teenager’s privacy （隐私）. Never read him his mail or listen in on personal conversions.

Teach your teenager that the family phone is for the whole family. If your child talks on the family’s telephone for too long, tell him he can talk for15 minutes, but then he must stay off the phone for at least an equal period of time. This not only frees up the line so that other family members can make and receive calls, but teaches your teenager moderation（节制）. Or if you are open to the idea, allow your teenager his own phone that he pays for with his own pocket money or a part –time job

68. The main purpose of the text is to tell parents _____________.

A. how to get along with a teenager

B. how to respect a teenager

C. how to understand a teenager

D. how to help a teenager grow up

69. What does the phrase “clam up” in Paragraph 2 probably mean?

A. become excited            B. show respect

C. refuse to talk                    D. seek help

70. What should parents do in raising a teenager according to the text?

A. Nor allow him to learn driving or take drugs

B. Give him advice only when necessary

C. Let him have his own telephone

D. Not talk about personal things with him

出口方银行为资助资本货物的出口，向进口商或进口方银行提供的中长期融资，是（）。

A.打包放款

B.福费廷

C.买方信贷

D.卖方信贷

肺转移性肝癌指的是（）

A.肺癌转移至肝

B.肝癌转移至肺

C.肝癌和肺癌同时转移至其他处

D.其他处的癌转移至肝和肺

E.肝癌和肺癌互相转移

某公司年销售额100万元，变动成本率70%，全部固定成本和费用20万元，总资产50万元，资产负债率40%，负债的平均利息率8%，假设所得税率为40%。

该公司拟改变经营计划，追加投资40万元，每年固定成本增加5万元，可以使销售额增加20%，并使变动成本率下降至60%。

该公司以提高权益净利率同时降低总杠杆系数作为改进经营计划的标准。

要求：

(1) 所需资金以追加实收资本取得，计算权益净利率、经营杠杆、财务杠杆和总杠杆，判断应否改变经营计划；

(2) 所需资金以10%的利率借入，计算权益净利率、经营杠杆、财务杠杆和总杠杆，判断应否改变经营计划。