SvO2的正常值是()
A.>97%
B.60%~80%
C.50%
D.60%
E.70%
参考答案:B
近年来,轿车价格频频降低,房地产价格节节攀升。这表明商品的市场价格[ ]
A、是由商品的质量决定的
B、是买卖双方讨价还价的结果
C、由价值决定并受供求关系影响
D、取决于居民的消费水平和消费结构
How exciting this football match is!Have you ever watched________ one?
A.a better
B.another better
C.a much too better
D.a very good