PaO2正常值是_____；PaCO2正常值是_____；正常人血pH值是_____

应用滑膜切除术治疗类风湿性关节炎的手术治疗原则是

A．滑膜组织，至少应切除70%以上

B．将软骨边缘的类风湿肉芽组织及血管翳刮除干净

C．尽量保留肌腱和重要的韧带组织，保持关节的稳定性

D．不截断骨组织，早期术后功能锻炼

E．以上都是

通常选用四格表资料Fisher确切概率计算法的条件是（）。

A.T<5

B.T<1或n<40

C.T<1且n<40

D.1≤T<5且n>40

E.T<5或n<40

Thanksgiving is a time to give thanks for family, health, and life in general. However, Black Friday has turned it into a business.

Traditionally, the true value of Thanksgiving lies at home not the shopping centers. However, Black Friday has nowadays allowed society to ignore this as individuals long for something that they do not need or even truly want. Shopping on Black Friday becomes a sign of a shift into a culture that values material wealth over spending time with loved ones. People are willing to force their way through the crowds in their desperate search for marked-down sweaters and necklaces.

In recent years, Thanksgiving has become a pre-Black Friday holiday for many families. They are devoted to mapping out shopping routes and making organized schedules for which stores to hit first. By drawing individuals out to shopping centers with "matchless savings", businesses encourage this behavior of ignoring Thanksgiving. Many families take their home-cooked meals while camping out at the door of shopping centers. With each new year, Thanksgiving is becoming victim to over-commercialization—switching from a meaningful time of thanks and family to a day dedicated to products and profit.

Black Friday has shown that with current common standards, people cannot even set aside a single day to appreciate what they already have without immediately buying more. Families have lost sight of what is truly important in life, and have found reasons in debating between a low cost HD television and an appreciation for what they already have. Remember, Thanksgiving should be a day in which people are grateful for all that they have.

小题1:The underlined word "this" in paragraph 2 probably refers to ______.

A．the sign of a shift

B．the material wealth

C．the shopping crowd

D．the true value of Thanksgiving小题2:In recent years, what will many families do when thanksgiving comes?

A．Make full preparations for the Black Friday shopping.

B．Visit some newly-opened shopping centers in advance.

C．Find it difficult to choose a store for their first visit.

D．Go camping at the gate of shopping center for a good deal.小题3:In the last paragraph, the author mainly intends to tell us that we should ______.

A．set aside a single day to buy more

B．try to spend less to get low cost products

C．stay with our families as long as we can

D．appreciate what we've possessed with our families小题4:What's the author’s attitude towards the present ways people celebrate Thanksgiving?

A．Annoyed.

B．Worried.

C．Supportive.

D．Unconcerned.

本月生产甲产品10 000件，实际耗用A材料32 000千克，其实际价格为每千克40元，该产品A材料的用量标准是3千克，标准价格是45元，其直接材料用量差异为( )。

A．90 000元

B．80 000元

C．64 000

D．-160 000元

甚高频通信的优点是（）。

A.可以大大压缩所占用的频带

B.节省发射功率

C.传播距离远

D.干扰较小、保密性好