要约在商品交易中又称为()。
A.发盘
B.出盘
C.出价
D.发包
参考答案：A, B, C, D
有一条电阻线，在其两端加1伏特电压时，测得电阻值0.5欧姆，如果在其两端加10伏特电压时，其电阻值应为（ ）
A．0.5欧姆
B．5欧姆
C．0.05欧姆
D．20欧姆
The Acropolis ________ in the 5th century B. C. at a high altitude above the city in honour of
Athena, the goddess of Athens.[ ]
A. constructed
B. was constructed
C. has been constructed
D. is being constructed
