湿疹的内用药物一般不选择()
A.普鲁卡因静脉封闭
B.抗组胺药口服
C.糖皮质激素口服
D.维生素C静脉滴注
参考答案:C
读一读,给下列句子排排序。
( ) No, it's not far.
( ) It's next to the hospital.
( ) Thank you.
( ) Is it far from here?
( ) Excuse me, where is the cinema, please?
( ) You're welcome.
当两种商品中一种商品的价格发生变动时,这两种商品的需求量都同时增加或减少,则这两种商品的需求交叉价格弹性为()
A.正值
B.负值
C.0
D.1