Yesterday morning ,Jim hurried to the st

( )是社会治安综合治理的领导力量。

A．各级党委和政府

B．城市综合执法部门

C．公安机关

D．司法机关

-- _________ you called yesterday?

-- Tom．Why?

A．Who it is that

B．Who is it that

C．Who was it that

D．Who it was that

漏斗盛700清水，（）清水流出所用的时间为15.0s±0.2s为合格（校验粘度计）。

A、300mL

B、400mL

C、500mL

D、700mL

腹部概述

甲胎蛋白妊娠何时在羊水中的浓度最高

A．17周
B．13周
C．7周
D．8周
E．11周