各部门和各企事业组织上报统计资料，审核、签署人是（）。

With the rapid development of petroleum industry, more and more oil products of high quality are being turned out.

我国婚姻的基本法是（ ）

在要约生效后，要约人为使要约丧失法律效力的意思表示称为()。

在孕妇腹壁上听诊，与母体心率一致的音响是（）

世界上第一部成文宪法是（）

----- Dad ，look at the building .It is on fire.

----- Call 119 ____________ mobile phone right now

In order to set up her research programme, Shona got____.

Xiao Ling works very hard. She ______ by the teachers.

.应始终保持最低级限度的适当防范性保安措施的等级称为保安等级()。