外渗性黏液囊肿常由( )所致
A．外伤
B．炎症
C．过敏
D．感染
E．化学刺激
参考答案：A
解析： 外渗性黏液囊肿常由外伤所致。
Yesterday they had a quarrel and broke up with each ?other?,but now they have . [ ]
A.turned up
B.put up
C.made up
D.shown up
塔式起重机，应将起重臂转至（）方向。
A、顺风
B、侧风
C、顶风
