Abstract: A method of removing external devices for a computer system includes detecting a plurality of external devices connected to the computer system; displaying a list via a display device when the computer system receives a removal indication signal, wherein the list comprises a plurality of selection fields corresponding to the plurality of external devices and each of the plurality of selection fields corresponds to one of the plurality of external devices, respectively; and determining whether to perform a removal procedure on an external device among the plurality of external devices according to whether a selection field corresponding to the external device among the plurality of selection fields is selected when the computer system receives a removal signal.

Abstract: Nucleic acid probes for detecting kRas gene mutations, liquid chips and detection methods thereof are provided. The liquid chips for detecting kRas gene mutations comprise: microspheres coupled with wild-type and mutant-type probes, each of which is amino-substituted at 5?-terminal, specific for kRas codons 12, 13 and/or 61, and primers for amplifying the target sequence biotin-labeled at the terminal which are enriched with mutant alleles of kRas codons 12, 13 and/or 61 to be detected. The detection methods are rapid and accurate, and the processes of the methods are easy to perform. The liquid chip can be used to detect mutations of kRas as assistance to early diagnosis of pancreatic cancer, and can be used to prognose efficiency of the molecular targeted therapy to choose right medicine accurately clinically and avoiding economic loss and time loss caused by unnecessary treatment.