曲轴箱外壁结霜的原因?
参考答案:
长期停车,曲轴箱内有液氨积存;带入液氨。
根据汉语提示完成句子
1. There is much ______(雨水) here in summer.
2. My uncle often ______(驾驶) his car to work.
3. Last week we had a day ______(休息).
4. I slept ______(晚) but got up early this morning.
5. If I meet Han Hong, the famous singer, I must get her ______(亲笔签名).
室间隔缺损,以上室间隔缺损属于哪型()
A.膜部室间隔
B.干下型
C.隔瓣下型
D.肌型
E.脊内型