蒸发二段清洗，一段热循环时真空突然下跌的原因有（）。A、气液分离器蒸煮时蒸气加得太多

根据材料内容选择最佳答案，并将其标号填入题前括号内。

Dear Darcy,

     I have braces (牙套), so it's important that I brush my teeth. But I don't like to brush my teeth at all. Do you have any ideas for how to make me enjoy brushing? 

                                                                                                   —Annoying in Gainesville 

    Darcy: A few changes should help you feel better about brushing. Start by getting a new toothbrush in your

favorite color. A tasty toothpaste might make you smile.

Dear Darcy,

    My best friend has moved to the countryside and I'm finding school really hard without him. What shall I do?

                                                                                                   —Lonely in Los Angeles 

    Darcy: Face the situation bravely! What's more important, try to be friendly and find other kids that share

your interest. That way you and other kids will have much to talk about. Sure you'll make new friends with

each passing day.

Dear Darcy,

    My friend's birthday is coming soon. I want to give her something special but I haven't got enough money

and I'm not good at making things. What's your advice, please? 

                                                                                                   —Anxious

    Darcy: When your friend knows what you're thinking, I think she will be happy. Does your friend mind how

much money you will spend on the gift? Write a letter to her or buy her a gift with the money you can afford.

A true friend never cares how much a gift costs.

Dear Darcy,

    I listen to your program every night. I also have a problem. My cousin's dog has just had babies and I really

want to have one for a pet. My parents won't allow the baby dog in! I really need your help. 

                                                                                                   —Helpless in Seattle

    Darcy: Your parents sure have their reasons for not having a pet. Maybe they don't have time looking after it.

So have a talk with them and make them believe you can be a good pet owner.

1. According to Darcy, he who               is easier to make new friends. [ ]

A. likes writing letters to her

B. takes good care of himself

C. can share his interest with others

D. buys special gifts for others

2. Helpless in Seattle has a problem that             . [ ]

A. she has no money to buy a dog

B. she can't find her dog

C. she has no time looking after her dog

D. she can't have a dog at home

3. There is no information in the text about where               comes from. [ ]

A. Helpless

B. Anxious

C. Annoying

D. Lonely

4. Darcy most probably works at              . [ ]

A. a school

B. a hospital

C. a radio station

D. an airport

5. We can learn from the text that              . [ ]

A. they have the same problem

B. Annoying will change her braces

C. Anxious won't buy an expensive gift

D. Lonely also moves to the countryside

东晋南朝时期，江南地区得以开发的最主要原因是  [ ]

A、北方农民南迁带来先进技术　　　

B、江南统治者调整统治政策

C、南方战乱少，社会安定 　　　　　

D、南方的自然条件优越

25岁，主诉尿急、尿痛、尿频3天， * * 分泌物增多，色黄伴外阴瘙痒。妇科检查：外阴、 * * 口充血，宫颈口有脓性分泌物。

考虑何种疾病可能性大（）

A.淋病

B.滴虫

C.细菌性 * * 病

D.梅毒

E.尖锐湿疣

在首次公开发行中的“绿鞋期权”是指发行人授予主承销商有权自主执行炒股计划融资规模（）的配售新股的权力。

A.5%

B.10%

C.15%

D.20%

采购费用处理时，费用可以在手工结算时进行费用分摊，运费发票记录也可以单独进行费用结算。