皮皮学，免费搜题
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搜题
【单选题】
静脉的结构特点错误的是A.
三层膜界限清楚
B.
较管腔较大
C.
内弹性膜不发达或缺如
D.
中膜薄，平滑肌稀疏
E.
外膜较厚
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
【单选题】听力原文：M: No. 11 Police Station. Can I help you? W: Yes. It's about my son Leech. He went to the school this morning but hasn't been back yet and it's 6:00 p.m. now. M: Just a moment, please. May I have...
A.
At Leech's school.
B.
In the police station.
C.
On the phone.
D.
At Mrs. Smith's home.
【单选题】听力原文：M: No.11 Police Station. Can I help you? W: Yes. It's about my son Leech. He went to the school this morning but hasn't been hack yet and it's 6:00 p. m. now. M: Just a moment, please. May I have...
A.
At Leech's school.
B.
In the police station.
C.
On the phone.
D.
At Mrs. Smith's home.
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