电流通过人体的（）这些途径最危险
A、心脏
B、肺脏
C、中枢神经系统
D、四肢神经系统
E、脾脏
F、肾脏
参考答案：A, B, C
____ the problem was ______ he could deal with, he called the police for help.
A．To realize; what
B．Having realizing; more than
C．Realized; more than
D．Having been realized; what
被誉为是17世纪中国科技的百科全书的著作是[ ]
A、《天工开物》
B、《本草纲目》
C、《齐民要术》
D、《徐霞客游记》
