按仪表工作电流的种类，分为（）、直流仪表、和交直流两用仪表。
参考答案：交流仪表
There was a ________ quarrel between the husband and the wife；after that the wife left home and
never came back. [ ]
A. sensitive
B. serious
C. violent
D. strict
按照承包方式分类合同可以分为（）
A.勘查、设计或施工总承包合同
B.单位工程施工承包合同
C.工程总承包合同
D.CM合同
