题目内容

A．At the post office.B．In a shop.C．At the bank.D．In a restaurant.

At the post office.
B. In a shop.
C. At the bank.
D. In a restaurant.

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为明确诊断，首选的检查是

A. 心电图
B. 胃镜
C. 食管钡剂透视
D. 超声心动图
E. 肝、胆、脾超声

A．At nine o'clock.B．At twelve o'clock.C．At one o'clock.D．At two o'clock.

At nine o'clock.
B. At twelve o'clock.
C. At one o'clock.
D. At two o'clock.

五味子的有效成分

煮沸消毒时为提高沸点可在水中加入

A. 氢氧化钠
B. 碳酸氢钠
C. 亚硝酸钠
D. 石遄酸
E. 明矾