随高度增加,对流层大气温度变化趋势与()温度变化趋势一致。
A.平流层
B.中间层
C.热层
D.电离层
参考答案:B
Amy ____the windows already, so the room looks much bright. [ ]
A. cleans
B. has cleaned
C. is cleaning
D. will clean
急性胃黏膜病变出血()
A.烧伤患者出现黑便
B.剧烈恶心、呕吐后出现呕血、黑便
C.节律性中上腹痛,突然出现黑便
D.因腰痛自服布洛芬后出现黑便