游客在旅途中会出现疲劳和懒散的状态，全陪应保持良好的精神状态，制造愉快宽松的旅途氛围

阅读表达。

     Sally was fourteen. She studied in a middle school. She liked dancing and singing and spent a lot of

time on them. But she hated math and even decided to give it up.Her father was anxious (焦虑) about it.

     It was Sunday. ①Sally's father called to his sister who taught math in another school. He hoped she

would come and tell his daughter how to learn math.The woman came and said, "You are a clever girl,

Sally. I'm sure you will soon learn math well if you do your best."

     "I'm afraid I can't, Aunt," said Sally. ②"Girls can't be good at math."

     "I don't think so," said the woman. "I was good at it when I was a girl. You must do more exercises

and try different ways to practice ③ ______ (do) math problems until you work them out or at least

understand them better. Here is a math problem. ④Please think it over and see if you can work it out."

     "OK." said the girl. "Let me try."

     About an hour later Sally took the exercise book to her aunt and said, "I've tried several times and

worked out the problem at last!"

     "Well done!" her aunt looked at her answer and said happily, "Now you see, math is not as difficult

as you thought."

1. 将划线②部分改为同义句

    Girl can't                                     math.

2. How old was Sally?

3. 将划线①部分译为汉语

4. 用所给词的适当形式填在③处的横线上 

5. 将划线④部分译成汉语

下列各句中，没有语病的一句是     (　　) (3分)

A．为了防止这类交通事故不再发生，我们加强了交通安全的教育和管理。

B．不管气候条件和地理环境都极端不利，登山队员仍然克服了困难，胜利攀登到了顶峰。

C．该市有人不择手段仿造伪劣产品，对这种坑害顾客骗取钱财的不法行为，应给以严厉的打击。

D．这次考试不难，但由于他准备得不够充分，差点儿就没及格。

孕妇血清绒毛膜促性腺激素（HCG）浓度达高峰是在妊娠（）

A.5～7周

B.8～10周

C.11～13周

D.14～16周

E.17～19周

小柳树遭破坏，茎的基部被剥去一圈树皮，一段时间后，该柳树死亡，这是因为

A．切断导管，根缺少无机盐

B．切断导管，根缺少有机物

C．切断筛管，根缺少无机盐

D．切断筛管，根缺少有机物

在决策分析过程中，从各个备选方案中，选取最优方案而放弃次优方案所丧失的潜在收益为（）。

A、沉没成本

B、机会成本

C、现时成本

D、付现成本