问题
多项选择题
可使咽鼓管咽口开放的肌肉是（）。
A.鼓膜张肌
B.腭帆张肌
C.镫骨肌
D.腭帆提肌
E.咽鼓管咽肌
答案
参考答案：B, D, E
解析：咽鼓管处于静止状态时软骨部闭合成一裂隙。腭帆张肌、腭帆提肌、咽鼓管咽肌起于软骨壁或结缔组织膜部，前两肌止于软腭，后者止于咽后壁，故当张口、吞咽、哈欠时借助上述三肌的收缩，可使咽口开放。
搜题请搜索小程序“爱下问搜题”
可使咽鼓管咽口开放的肌肉是（）。
A.鼓膜张肌
B.腭帆张肌
C.镫骨肌
D.腭帆提肌
E.咽鼓管咽肌
参考答案：B, D, E
解析：咽鼓管处于静止状态时软骨部闭合成一裂隙。腭帆张肌、腭帆提肌、咽鼓管咽肌起于软骨壁或结缔组织膜部，前两肌止于软腭，后者止于咽后壁，故当张口、吞咽、哈欠时借助上述三肌的收缩，可使咽口开放。
| 用方框中所给单词的适当形式填空，使短文完整正确。（每个单词限用一次） | |
| |
| My friend, Tom, has a big police dog l _ Timmy. Police 2 are often very smart. Every Sunday afternoon my friend takes Timmy for a long walk in the park. Timmy likes 3 very much. One Sunday aftemoon a man 4 _ my friend. He talked 5 _ my friend for a long time. They talked and talked. Soon it was time 6___ _my friend to take Timmy for his walk,but the man still stayed. Timmy 7 very worried about his walk in the park. He walked around the living-room sometimes and at last 8 down before the man and looked at him. But the man went on 9 . After thirty minutes, Timmy couldn't stand it. He went out of the room and 10 back a few minutes later. He sat down in front of the man again but this time he held(持有)the man's hat in his mouth. |