皮皮学，免费搜题
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搜题
【多选题】
共鸣腔的类型包括有()。A.
鼻腔共鸣
B.
头腔共鸣
C.
胸腔共鸣
D.
喉腔共鸣
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
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【单选题】如图 所示 , 质量为 m 的物体用平行于斜面的细线联结置于光滑的斜面上,若斜面向左方作加速运动,当物体刚脱离斜面时,它的加速度的大小为
A.
gsin
B.
gcos
C.
gtan
D.
gcot
【简答题】In those days even bicycles were very dear and hard to ______, and coupons were issued for them.
【简答题】And even graves themselves soon ______back into the soil.
【单选题】Some people say that if the holder of chopsticks pushes them______ his stomach to even them up instead of tapping them on the table, the chances are he is a coolie.
A.
on
B.
against
C.
at
D.
to
【单选题】Every minute is made full _____ of _____ our lessons well.
A.
to use; study
B.
use; studying
C.
use; to study
D.
used; studying
【单选题】Much to her delight, three _________ neighbors showed up and several of them even brought with them some candies and cookies.
A.
dozens
B.
dozen
C.
dozen of
D.
dozens of
【简答题】In those days even bicycles were very dear and hard to ______, and coupons were issued for them.
【单选题】如图所示,质量为m的物体用平行于斜面的细线连接置于光滑的斜面上,若斜面向右方作加速运动,当物体刚脱离斜面时,它的加速度的大小为( )
A.
;
B.
;
C.
;
D.
。
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