抗叶酸代谢的抗菌药有()和()。
参考答案:磺胺类;增效剂
A cook will be immediately fired if he is found _____ in the kitchen.[ ]
A. smoke
B. smoking
C. to smoke
D. smoked
根据我国《保险法》的规定,在人身保险合同中,被保险人或者投保人只能指定一人为受益人。( )