用来实现执行元件准确位置的控制回路称()控制回路。
A.位置
B.压力
C.速度
D.同步
参考答案:A
根据句意及首字母提示写出单词。
1. My uncle is not at home. He's at w _____.
2. I like eating s _____ food.
3. The _____(装饰)of the house is very special(特别的).
4. My brother has two _____(圆的)eyes.
5. —Where's Jim ?
—He's getting r _____ for his English test in his room.
闭合性肋骨骨折的病人,如果出现下列哪项症状提示可能合并有肺或支气管损伤?
A.伤侧呼吸音减弱
B.伤侧肺有啰音
C.伤侧胸内剧痛
D.伤侧皮下气肿
E.伤侧胸膜腔有积液