A．surveyB．surveillanceC．survivalD．surrender

Although the mission was meant to be kept a secret, it ____ .

（a）The viscosity of Cl2 at 293 K and 1 atm is 132 μ P. Determine the collisional cross section of this molecule based on the viscosity. （b）Given your answer in part (a), estimate the thermal conductivity of Cl2 under the same pressure and temperature conditions.

Preparation is _______, involving close surveillance of the child, and of his friends and family.

Anne et Marie (se réveiller) à six heures ce matin.

检疫监管（Quarantine supervision，surveillance）

售后调研（postmarketingsurveillance）

The bride wears the white veil and long white dress as white signifies purity and sanctity.

The NYPD has effective and efficient collaborations with many countries.

The New York police force can speak 60 foreign languages and dialects.