新生儿出生后第4天,评估提示异常的是
A.脐带已脱落B.已接种过卡介苗C.体重比出生时下降6%D.体温37℃E. * * 外口大片血迹
参考答案:E
Though tigers are ______ to people, they are ______ now and we should protect them or they will die out.
A.dangerous ; dangerous
B.in danger ; in danger
C.dangerous ; in danger
D.in danger ; dangerous
负反馈虽然使放大倍数(),但放大器其他性能也得到改善。
A.不变
B.改变
C.下降
D.上升