题目

 — Excuse me, I want to go to the 21st National Book Expo (世博会). Could you tell me______? — Sure. It is at No. 3 Changjiang Road in Harbin. A. where it is B. where it was C. where is it 答案：A 【解析】考查宾语从句。宾语从句用陈述语序，排除C。从语境分析本句为一般现在时。故选A。下列各装置中，能构成原电池的是