唾液中的溶菌酶具有杀菌作用，与这中免疫属于同一类型的是（  ）

五位中国学生要去美国留学，他们想要找住家。请仔细阅读第1-5题中的学生的个人情况说明，并从A至F六个选项中，帮助他们选择最适合的住家（其中一项为多余选项）
____ Zhang Chao likes Chinese food. He hopes his host family speak a little Chinese.
____ Li Wei likes doing sports. He wants to live near a park.
____ Liu Yong hopes to live near his school---Reading School. He prefers a bed room with a bathroom
____ Chen Yao wants to live in a big bedroom cheaper than ￡350 a month. She can’t stand pets.
____ Hu Mei loves pets. She would like a bedroom cheaper than ￡220 a month.

读黄土高原资料，完成下列问题。

如图为一款火箭动力自行车，最快行驶速度可达333km/h．将常温状态下的过氧化氢气体通过　____ 　的方法液化成液态，再与催化剂一起放于燃料罐中，反应后向火箭尾部喷出650℃的高温水蒸气，自行车即可获得向前的巨大推力，从而高速前进．图中火箭尾部产生大量的白气现象，是因为尾气中的　____ 　发生了　____ 　现象．