熔剂粒度越细，烧结过程中透气性越好，对生产越有利。

配合比应根据原材料品质、混凝土设计强度等级、混凝土耐久性以及施工工艺对工作性的要求，通过计算、试配、调整等步骤选定；还应遵循一些基本规定。下列（）与基本规定不符。

A.C30及以下混凝土的胶凝材料总量不宜高于400kg/m³

B.混凝土水胶比不得大于0.45

C.C50及以上混凝土不宜高于500kg/m³

D.C35～C40混凝土不宜高于450kg/m³

第三部分阅读理解（共20小题, 56-70题，每小题2分；71-75题，每小题1分，满分35分）

第一节阅读下列短文，从每题所给的四个选项（A、B、C、D）中，选出最佳选项。

If you’re looking for the place that has everything, there’s only one place to visit, and that’s New York. It’s a whole world in a city.

The World of Theatre: All of New York is a stage. And it begins with Broadway. Where else can you find so many hit shows in one place? Only in New York!

The World of Music: Spend an evening with Beethoven at Lincoln Center. Swing to the great jazz of Greenwich Village. Or rock yourself silly at the hottest dance sports found anywhere.

The World of Art: From Rembrandt to Picasso. From Egyptian tombs to Indian teepees. Whatever kind of art you like, you’ll find it in New York.

The World of Fine Dining: Whether it’s a roast Beijing duck in Chinatown, lasagna in Little Italy, or the finest French coq au vin found anywhere, there’s a world of great taste waiting for you in New York.

The World of Sights: What other city has a Statue of Liberty（自由女神像）? A Rockefeller Center? Or a Bronx Zoo? Where else can you take a horse-drawn carriage through Central Park? Only in New York!

1. Which of the following programmes can a visitor have only in New York?

A. To enjoy roast Beijing duck.         B. To taste the finest French coq au vin.

C. To spend an evening with Beethoven. D. To see the Statue of Liberty.

2. From the text we know that “Rembrandt” is most likely the name of a famous ________.

A. singer        B. painting       C. play            D. painter

3. What the writer really wanted to do is to ________.

A. try to persuade readers to pay a visit to New York

B. give readers some information about New York

C. supply readers with some wonderful programmes in New York

D. help readers to get a better understanding of New York

在某H₂O₂溶液中氢元素与氧元素的质量比为2：17，现向19g该H₂O₂溶液中加入1g二氧化锰，充分反应后，生成氧气的质量为

（　　）

A．1g

B．1.6g

C．4.2g

D．8.5g

在进行变电所绝缘子串的绝缘配合时，其雷电过电压配合系数取( )。

A．1.35；
B．1.45；
C．1.55；
D．1.65。