10个月患儿，初次感染结核杆菌至产生变态反应的时间是
A．1～2周
B．2～3周
C．3～4周
D．4～8周
E．10～12周
参考答案：D
_____into the house, the thief was soon caught by the police.
A．Having seen him steal
B．Seen stolen
C．Seen stealing
D．Seeing him steal
下图所示地形部位名称排序与图序相符的是
A．①山脊②山谷③鞍部④山顶
B．①山谷②山谷③山顶④鞍部
C．①山谷②山脊③山顶④鞍部
D．①山脊②山脊③山顶④鞍部
