— __________ do you go to work?
— I go to work by bike. [ ]
A. Where
B. Who
C. How
答案:C
秋季流行腹泻中,6个月小儿,2天吐泻20余次,精神萎靡,皮肤干燥,弹性较差,眼窝明显凹陷,尿量明显减少,唇干肢冷,血压9.3/5.3kPa,体温36.5℃,恰当补液应为
A.90ml(kg·d)
B.90~120ml/(kg·d)
C.120~150ml/(kg·d)
D.150~180ml/(kg·d)
E.>180ml/(kg·d)
含单链环状DNA,感染细菌后,可形成过渡阶段的双链环状复制型DNA
A.pBR322B.DNAC.装配型质粒D.M13-DNAE.穿梭质粒