皮皮学，免费搜题
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【多选题】
气血屏障包括A.
肺泡表面活性物质
B.
Ⅱ型肺泡细胞及基膜
C.
薄层结缔组织
D.
血管基膜和内皮
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Talking through a screen door while standing outside a house is not co ns idered by most America as being ________ the house or room in any see of the word.
【单选题】卫星上的通信天线按覆盖面从小到大排序为（ ）[1分]
A.
点波束天线、球波束天线、半球波束天线
B.
球波束天线、半球波束天线、点波束天线
C.
点波束天线、半球波束天线、球波束天线
D.
半球波束天线、点波束天线、球波束天线
【简答题】I looked down the counter, and all the people behind the counter were just standing there, drinkingcoffee and staring into a dark screen翻译是
【单选题】听力原文：(A) The woman is touching the computer screen. (B) They are standing side by side. (C) They are looking at the monitor. (D) The man is trying on some clothes.
A.
B.
C.
【简答题】将单词official,judge,original,focus,business,edge,present,screen正确形式填入到下列句子中 6. Standing at the _______ of the mountai, we could see for miles and miles to the east.
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