不属于氢氧化钙特性的是
A. 弱碱性
B. 呈弱酸性
C. pH值为9~12
D. 能够促进牙本质桥的形成
E. 具有一定抗菌作用
Jack and Lynn will ()married for thirty years tomorrow
A. have
B. be
C. become
D. have been
关于潜在性房室旁路特征的表述,不正确的是
A. 旁路潜在的原因是旁路传导慢于房室结
B. 常规心电图不出现delta波
C. 用食管心房调搏可诱现deita波
D. 旁路有前传功能
E. 伴心房颤动时,不会有引起快速心室反应的潜在危险
All our preparations went () because the exam was cancelled.
A. for all
B. for everything
C. for anything
D. for nothing