※ [39~40]( ). ( 4)
参考答案:A
The main purpose of the Customs supervision and control is to ______ China, seconomic, trade, scientific, technological and cultural exchanges with other countries.
A.supervise
B.control
C.promote
D.limit
硝酸装置温度测量采用()分度号热电偶。
A.N
B.B
C.E
D.K