皮皮学，免费搜题
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搜题
【单选题】
哪项不是固定义齿的组成成分A.
固位体
B.
连接体
C.
基牙
D.
桥体
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】The roar of the crowd combined with the speaker’s own low-decibel (分贝) delivery ensured that few could hear anything he said.
A.
a shocking noise like thunder
B.
a very loud and forceful voice
C.
a sudden loud noise by sth. breaking
【简答题】The crowd's roar turned to ________ when Willy emerged from the dressing-room.