锥体束受累各种深反射受何影响（）
A.减低
B.增高
C.不变
D.可以增高或降低
E.以上均不正确
参考答案：B
宋辽、宋夏和议中共同内容有 （ ）
A．辽夏向宋称臣
B．北宋割地求和
C．互相禁止边境贸易
D．北宋送给辽夏“岁币
— I ______ have turned on the air conditioner at such a low temperature.
— No wonder you've got a cold. [ ]
A. shouldn't
B. couldn't
C. mustn't
D. needn't
