皮皮学，免费搜题
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搜题
【单选题】
在搜索引擎中,利用Title、Site、URL等限制符所进行的查询称为_____检索。A.
逻辑
B.
字符串
C.
字段限制
D.
概念
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】-- Why are you rolling up the carpet? ____(you paint) the ceiling? No, I ____(take) the carpet to the cleaners.
【单选题】I couldn’t clean the carpet yesterday because the vacuum cleaner _______.
A.
had been repaired
B.
was repairing
C.
was repaired
D.
was being repaired
【单选题】血-气屏障的构成是
A.
毛细血管内皮、内皮基膜、肺泡上皮
B.
毛细血管内皮及其基膜、肺泡上皮的基膜
C.
毛细血管内皮及其基膜、肺泡上皮及其基膜
D.
肺泡上皮、弹性纤维、上皮基膜
E.
肺泡隔、肺泡上皮、上皮基膜、尖细胞
【单选题】血-气屏障的构成是
A.
毛细血管内皮、内皮基膜、肺泡上皮
B.
毛细血管内皮及其基膜,肺泡上皮的基膜
C.
毛细血管内皮及其基膜,肺泡上皮及其基膜
D.
肺泡上皮、弹性纤维、上皮基膜
E.
肺泡隔、肺泡上皮、上皮基膜、尘细胞
【单选题】As I looked at the carpet, I wished that it (could) speak, (since) it (must witness) many interesting events (in) the past decade.
A.
could
B.
since
C.
must witness
D.
in
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