1787年美国制定的《合众国宪法》所体现的原则源自于 [ ]
A．伏尔泰
B．卢梭
C．洛克
D．孟德斯鸠
答案：C
The form of receipt for any Customs duties collected for the delayed payment shall be prescribed by ______.
A. The Customs General Administration B. The Customs HousesC. The Tariff commission D. The Ministry of Finance
磁电式仪表的特点是测量准确度和灵敏度（）。
A.高
B.相同
C.低
