45.属于治疗流行性脑脊髓膜炎的首选药物之一的是（ ）。
A. 磺胺甲恶唑
B. 磺胺嘧啶
C. 磺胺异恶唑
D. 甲氧苄啶
E. 磺胺米隆
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34.为防治长期或大剂量应用异烟肼所致的周围神经炎宜合用（ ）。
A. 维生素B1
B. 维生素B2
C. 维生素B6
D. 维生素B12
E. 维生素C
48.乙胺丁醇治疗结核病时联合用药的主要目的是（ ）。
A. 促进药物进入细胞内
B. 延长药物半衰期
C. 延缓耐药性产生
D. 扩大药物抗菌范围
E. 减少不良反应
35.化疗指数是（ ）。
A. ED90/LD10
B. ED50/LD50
C. LD90/ED50
D. LD50/ED50
E. LD95/ED5
For a sales transaction to be covered by the UN Convention on Contracts for the International Sale of Goods (CISG), the buyer and seller must have their places of business in different states, and: ( )
A. Both the buyer’s state and the seller’s state must be parties to the CISG.
B. Either the buyer’s state or the seller’s state must be a party to the CISG.
C. The rules of private international law must lead to the application of the law of a state that has become a contracting party of the CISG.
D. Either or C.
Either or C.
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