开放性胸外伤的诊断主要依据是()
A.胸壁有开放性伤口
B.食管破裂
C.肋骨骨折刺破胸膜
D.胸壁有创口与胸膜腔相通
参考答案:D
Only after my friend came ____.
A.did the computer repair
B.he repaired the computer
C.was the computer repaired
D.the computer was repaired
请根据“给定资料2-6”,分析概括我国环保方面存在哪些问题 要求:准确、全面。不超过350字。