A circuit breaker and a fuse have a basic similarity(类似) in that they both ______.
A. can be reset to energize the circuit
B. should open the circuit when overloaded
C. will burn out when an over current flow develops
D. should short the circuit when overloaded
What type of valve is used to direct the flow of hydraulic fluid？
A. relief valve
B. direction control valve
C. stop valve
D. pressure control valve
几何学可以让人领会到不以人们意志为转移的、外在的、客观的逻辑。()
具有高度的责任心不要求做到()。
A. 方便群众，注重形象
B. 责任心强，不辞辛苦
C. 尽职尽责
D. 工作精益求精
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