熔断器在电路中要（）在保护电路中。
A、并联；
B、串联；
C、混联；
D、任意联接
参考答案：B
Whenever the government increases public services,______ because more workers are needed to carry out these services.
A．employment to rise
B．employment rises
C．which rising employment
D．the rise of employment
冲突规范的结构包括（）和准据法两部分
