胃癌最好发的部位是（）
A.幽门管
B.胃底部
C.胃体侧
D.胃窦部
E.贲门部
参考答案：D
If people _____ the importance of living a low-carbon life earlier, there _____ so many environmental
problems now. [ ]
A. realized; wouldn't be
B. had realized; wouldn't be
C. had realized; wouldn't have been
D. realized; wouldn't have been
用携带型火炉或喷灯时，火焰与带电部分的距离：电压在10kV以上者，不得小于（）
A、1.5m
B、2.5m
C、3m
