Titrate is ( ) for each 1 ml of titrant at the specified concentration. A: the mole number of the drug measured B: the mass of the drug measured C: the mole number of the standard substance D: the mass of the standard substance

Mole系统中有两种Agent：系统Agent和用户Agent。

How to differentiate invasive mole with choriocarcinoma?() A: seen<br/>villous pattern, is choriocarcinoma B: with<br/>lung metastasis , is choriocarcinoma C: followed<br/>by mole, is choriocarcinoma D: followed<br/>by normal labor or abortion, is choriocarcinoma E: none<br/>of them

The mole tried to fit into his hole without first taking his hat off. (Para. 4)

Which of the following should be balanced in a model? ( ) A: charges B: COD C: components in mole/L D: elements

One mole of hydrogen with an initial temperature of 27℃ expands<br/>and in the process, absorbs 4000 J of heat and does 3000 J of work,<br/>the<br/>final temperature of the gas is () A: 62.3℃ B: 105.6℃ C: 75.1℃ D: 56.3℃

1995年，德国斯图加特大学设计开发出（）系统。该系统基于纯Java，也是最早用Java语言实现的移动Agent系统之一。 A: Aglets B: Mole C: D’Agent D: Telescript

（）系统主要由3部分组成：一是编写Agent和场所的语言，二是语言解释器，三是实现引擎交换的移动Agent通信协议。在Telescript当中主要实现了以下基本概念：Agent、场所、旅行、会晤、授权和许可证。 A: Telescript B: Aglets C: Mole D: D’Agent

天然气是一种气体混合物，要了解它的性质，必须知道各组分性质间的关系。混合物的组成可用（）或它们的百分数来表示。Natural gas is a mixture of gases. To understand its properties, it is necessary to know the relationship between the properties of each component. The composition of mixtures may be expressed by volume fraction, mole fraction, mass fraction, or percentage of them. A: 容积分数 B: 摩尔分数 C: 重量分数 D: 质量分数