什么是活性混合材料和非活性混合材料？掺入硅酸盐水泥中各能起到什么作用？
参考答案：
活性混合材料中有一定的活性组分，常温下能与水泥熟料水化时析出Ca（OH）2的或在硫酸钙的作用下生成具有胶凝性质的稳定化合物。非活性混合材料与水泥矿物成分不起化学反应或化学反应很弱，在水泥石中主要起填充作用，掺入硅酸盐水泥中主要调节水泥强度等级，增加产量，降低水化热等。
 第Ⅱ卷（非选择题两部分共35分） 第四部分：任务型阅读（共10小题；每小题1分，满分10分） 请认真阅读下列短文，并根据所读内容在文后表格的空格处填入最恰当的单词。注意：每个空格填1个单词。 The expo theme, "Better City, Better Life", highlights the new thinking, new technologies and new practices for achieving healthy and sustainable urban living. Guided by these concepts, the New Zealand Pavilion will follow the theme, "Cities of Nature, Living between Land and Sky". The aim of the pavilion is to present a welcoming vision of a nation that is working hard to bring its cities into a sustainable balance with nature; a country in which natural beauty, the inspiration that it brings, and the lifestyles that it permits, can exist alongside and contribute to a modern and creative first world economy. In its form and content the pavilion takes inspiration from the Maori creation story in which the god Tane separated his parents, the Sky and the Earth, to create space both for the natural world and for human beings. The location The pavilion will be located in one of the prime sites at the expo, close to the host country's pavilion and alongside the enormous theme pavilion. It will neighbor on the main walkway and will be seen by virtually every visitor to the expo. The design Designed and built by international project management company Coffey Projects, the distinctive wedge-shaped pavilion will have a projected capacity of 40,000 visitors per day. It will cover approximately 75 percent of a 2000- square-metre corner site, close to both the China Pavilion and the China Theme Pavilion, and beside the main elevated walkway. Two of the visitor experience areas: Cities of Nature Experiencing Inside the wedge, visitors will walk along a winding ramp(斜坡) that gradually rises up, taking them through a "day in the life" of a New Zealand family in a composite New Zealand city in a natural setting: from the mountains to the sea, past farmlands and bush and back towards the mountains, through a beachhouse, a school classroom and an office building. Garden and wild places walk Visitors will exit the Cities of Nature experience near the top of the wedge, and will then walk back down towards the corridor area through a garden planted with New Zealand trees and flowers, and making use of sculptural elements, audio and lighting.
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