普通电子点火系按点火信号发生器的不同分为电磁感应式、霍尔效应式、光电式和电磁振荡式等。()
参考答案:对
下列哪些是上消化道出血的止血措施( )
A.去甲肾上腺素8毫克加入1000ml水中分次口服
B.血管升压素
C.二腔两囊管压迫
D.注射硬化剂
E.洛赛克
The shopkeeper did not want to sell for _____ he thought was not enough. [ ]
A. where
B. how
C. what
D. which