[单项选择]下列是关于石灰在土木建筑工程中的应用表述错误的是( )。
A. 配制水泥石灰混合砂浆，石灰砂浆
B. 拌制灰土或三合土
C. 生产硅酸盐制品
D. 石灰的硬化只能在空气中进行

At the turn of the century it is estimated that a student living alone requires on average A$12 000 (Australian dollars)in living expenses for each year of study in Australia. Of course, these costs increase with time.
Upon arrival, students should have funds in excess of the average to cover the cost of text books and establishment expenses such as rental payment and basic furniture items. The amount spent on food, recreation, and entertainment expenses will vary according to requirements, budget, and location.
Those who are prepared to live in shared accommodation, which may not be suitable for all, might manage on AS 10 000 per year. It is preferable for overseas students whose English is in need of practice to take advantage of living in situations with native speakers whenever possible. However, sharing with friends who are easy to communicate with is probably more sensible at first.
The above figures do not include the cost of large non-essen
A. It is not preferable for overseas students to share accommodation with others.
B. Students are encouraged to buy second-hand cars because transportation is not convenient.
C. It is better to find a roommate who is ready to help you in your English study.
D. It is much easier to reach major cities by train.