晶体管开关电路利用的是三极管的放大特性。
参考答案:错
承包合同价或工程概算中包括有购置工程施工所必需的施工机具的费用时,可在()项目中投保。
A.保证保险
B.安装工程
C.运输
D.建筑工程
We didn’t find ______ in the picture. Would you please tell me? [ ]
A. unusual anything
B. nothing unusual
C. anything unusual
D. unusual something