风心病二尖瓣狭窄的典型面容是()
A.面色灰暗,双颊发红,口唇发绀
B.面色苍白,表情疲惫
C.面色灰褐,额部有褐色色素沉着
D.面容惊愕,目光闪亮
E.表情淡漠,反应迟钝
参考答案:A
—May we leave the classroom now?
—No, you . You to leave until the bell rings. [ ]
A. must; are allowed
B. can't; aren't supposed
C. needn't; aren't allowed
不属于临产后正常宫缩特点的是
A.节律性
B.规律性
C.对称性
D.极性
E.缩复作用