性发育启动年龄显著提前者(较正常儿童平均命令提前2个标准差以上)，即为性早熟。()
参考答案：对
用所给单词的适当形式填空。
1. My favourite (sport) are soccer and basketball.
2. I often wear (run) to play soccer
3. How much (be) a pair of shoes ?
4. I want (learn). Can you teach me ?
5. Do you have (some) balls ?
开放性气胸的急救措施首先是
A．吸氧，纠正休克B．给予呼吸兴奋药C．封闭胸壁伤口D．胸腔闭式引流E．立即手术
