A personal search by using a hand-held metal detector is called ________.
举一反三
- 163．When using a hand held smoke signal from a lifeboat, you should activate the signal __.
- Their search engine was called “ ” at first.
- Jack ____ his hand and touched the animal's head A: held over B: held back C: held out D: held in
- When preparing specimen with hand-held slicing, the correct direction of cutting with the right hand blade is from the front left to the right rear.
- If the search is to sequentially expand the nodes through a program close to the starting node, this search is called deep search.