粘结和锚固是钢筋和混凝土形成整体、共同工作的基础。
参考答案：对
— Guess what? One bullet struck my car, missing me yesterday!
— Lucky you ! Come back to our motherland as soon as possible![ ]
A. narrowly
B. nearly
C. lightly
D. slightly
阀短路保护的目的和原理是什么？
