在白天或夏季，土壤温度随土层深度增加而降低的类型，称为辐射型。

套期交易与投机交易的区别在于（）。

A.套期交易关注的是不同合约或不同市场之间的相对价格关系，而投机交易关注单个合约的绝对价格变化

B.套期交易流动性较差，而投机交易流动性较好

C.套期交易在同一时间不同合约或不同市场之间进行相反方向的交易，而投机交易只做买或卖的交易

D.套期交易不活跃，而投机交易很活跃

肺肿瘤在肺显像中的典型表现为()

A．（99m)Tc-MAA灌注显像中有缺损区，而（99m)Tc-DTPA气溶胶吸入显像中无缺损区

B．（99m)Tc-MAA灌注显像中无缺损区，而（99m)Tc-DTPA气溶胶吸入显像中有缺损区

C．（99m)Tc-MAA灌注显像和（99m)Tc-DTPA气溶胶吸入显像均表现有缺损区

D．（99m)Tc-MAA灌注显像中有缺损区，（99m)Tc-DTPA吸入显像中有增高区

E．（99m)Tc-MAA灌注显像中有增高区，而（99m)Tc-DTPA气溶胶吸入显像有缺损区

皮肤受到热刺激时，皮肤及血管的变化是（）

A.皮肤血管收缩，减少皮肤供血

B.皮肤血管舒张，汗腺分泌增加

C.皮肤血管收缩，汗腺分泌增加

D.皮肤血管不发生变化，汗腺分泌增加

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of (21) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (22) which is concluded with a well-defined (23) and can be further broken down into (24) - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (25) logically by nature.

23（）

A.milestone

B.end-mark

C.measure

D.criteria

在消费心理学研究中应把握的基本原则包括（）

A.理论联系实际原则

B.客观性原则

C.全面性原则

D.发展性原则

E.社会化原则