机动车通过隧道时可以超车。
参考答案：错
通常表示水泥抗折和抗压强度的单位为：（）
A、Pa
B、MPa
C、KPa
D、KN
Her panic was transient, and ceased when she began to speak.()
A. beyond description
B. unnoticed
C. passing quickly
D. vague
