抗原(antigen)
参考答案:
是指能与TCR/BCR或抗体结合,具有启动免疫应答潜能的物质
No _____ that you will pass the coming exam, for you have been well prepared for it. [ ]
A. wonder
B. problem
C. question
D. doubt
在停风停电的采掘工作面,未经检查瓦斯可直接送电。()