Anyone in the lab has to the following dos and don’ts.A. observeB. consultC. recognizeD. d

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(答案→)A. observe
B. consult
C. recognize
D. direct
解析：句意：实验室的任何人都要遵守下面的该做的，和不该做的。四个选项的含义分别是 ：A．observe观察，庆祝，遵守，B．consult咨询，C．recognize认识，识别，D．direct指导，根据句意选A。