在测定发热量时,点火采用()V或()V电源,由220V电源经变压器供给。
参考答案:12; 24
He _____ some food here and _____ some water there. [ ]
A. brought…took
B. took…brought
C. bring…took
D. take…brought
感冒主因为
A.感受触冒风邪B.肺卫调节功能失常C.生活起居失常,寒温失调D.过度劳累,而致肌腠不密E.体质偏弱,卫表不固