抵抗高温的耐热混凝土、抵抗化学侵蚀的混凝土等都属于特种混凝土。
参考答案：对
For your next vacation, why not _____ Canada? [ ]
A. consider to visit
B. considering visit
C. consider visiting
D. to consider visiting
Do you think maths is _____ than English? [ ]
A. difficult
B. as difficult
C. more difficult
D. most difficult
