六海指后三海(西海、后海、前海)和前三海(北海、中海、南海)。目前北京旅游界又统称前

根据短文内容判断句子正误，正确的在题前括号内写“T”，错误的写“F”。

Dear Tom,

      I am studying in Beijing now. I have a day off today. Now let me tell you something about Beijing. In our

country people drive cars on the left side of the road, but here in Beijing, on the right side. Many people of

London go to work by car, while most people of Beijing go to work by bike. The weather of Beijing is better

than ours. It's fine for long here, but we have so many cloudy days in London. Students here work hard at

their lessons and a lot of people can speak English. It's a pity that students in our country don't work hard

and few people know Chinese. That's all for today. Please write to me soon.

                                                                                                                                 Your ever,

                                                                                                                                    Peter

( )1. This letter is from an English boy to his friend Tom.               

( )2. Peter is a farmer, not a student.                                   

( )3. Tom may be a middle school student in London.                       

( )4. In England cars go along the road on the right side.                

( )5. Peter thinks the Chinese students work harder than English students.

用于治疗子宫内膜癌的激素类药物主要是__________类药物。

在编制审计计划时，需考虑影响样本量大小的有关事项，对审计抽样工作进行规划。以下各项表述中，正确的是( )。

A．可接受的抽样风险越低，需选取的样本量越小

B．总体项目的变异性越低，需要的样本规模越大

C．可容忍误差越小，需选取的样本量越大

D．预期总体误差越小，需选取的样本量越大

复审不合格的应当重新参加考试。逾期未申请复审或考试不合格的，其《特种设备作业人员证》予以（）

A、重新考试

B、注销

C、重新申请

猪的品系繁育中，零世代基础群的规模，一般以8头公猪（）头母猪为宜。

A.30

B.40

C.50

D.35