强制循环锅炉炉水泵振动大有哪些原因？

Tom and Mike were good friends.Sometimes they were kind to each other, sometimes they were not.But all of their classmates said they were like brothers.

One day they went out for a walk together.At noon they were very hungry and they went into a restaurant to have lunch.The waiter came up to them and asked, “What can I do for you?”

“Please bring us two apples first.” said Tom.

When the waiter put two apples on the table, Mike took the bigger one at once.Tom got angry.

“You are impolite, Mike.Why don’t you take the smaller one?” Tom said.

“But I am right.” said Mike with a smile, “if I let you take first, which one will you choose?”

“Of course I’ll take the smaller one.” said Tom.

“Yes,” Mike said, “If you take the smaller one, the bigger one will still be mine.Don’t you think so?”

“Oh!” Tom couldn’t answer.

小题1:Tom and Mike were       .

A．always kind to each other

B．sometimes kind to each other

C．dear brothers

D．friends of different school小题2: Mike thought only about       when they were having lunch.

A．himself

B．Tom

C．his parents

D．his friends.小题3:The waiter gave them       .

A．two eggs

B．two apples

C．three oranges

D．some milk小题4:Tom took the       apple.

A．better

B．bigger

C．smaller

D．worse小题5:     took the apple first.

A．Mike

B．Tom

C．Tom and Mike

D．The waiter

片剂中的肠溶衣材料（）.

A．F₁₂

B．HPMC

C．HPMCP

D．β-CD

E．丙二醇

6岁女孩，因肛门及会阴部瘙痒、夜间为重就诊。患儿近来常有睡眠不安、夜惊常搔抓肛门周围及会阴部，伴有尿急、排尿次数增多且疼痛。查体：心肺腹未见异常，肛周、会阴部、生殖器有抓痕，皮肤破溃，其他未见异常。血常规及尿常规未见异常。

对该病例最简便易行的检查方法是（）

A. * * 分泌物涂片找虫卵

B.患儿入睡后1～3小时在肛门会阴部查找成虫

C.清晨便前肛周棉签拭子法检查

D.粪便饱和盐水漂浮法找虫卵

E.尿液镜检找虫卵

下面关于礼仪的描述不正确的是（）。

A.礼仪是人际交往中的一种行为方式

B.礼仪是人际交往中的一种行为习惯

C.礼仪是人际交往中的一种习惯方法

D.礼仪是人际交往中的一种行为规范和准则

E公司拟投资建设一条生产线，资本成本为10%，现有四个方案可供选择，相关的净现金流量数据如表所示：

计算A方案的静态回收期指标。