目前超声检查中常用的超声诊断频率是()
A. 小于1.5MHz
B. 在2~10MHz之间
C. 在20~40MHz之间
D. 在40~80MHz之间
E. 大于80MHz
The heart is 1______________________ the stomach, for they are both controlled by the brain. 心脏和胃一样都无智力可言,因为它们都是由大脑控制的。Human is 2____________ a monkey is. 人和猴都是动物。It is 3____________ a scandal. 这实在是一件丑闻。4__________ you're older than me 5___________you know everything.你比我年长并不意味着你什么都知道。
Directions:Pleasecompletethesentenceswiththewordsorexpressionsinthebox.Makechangeswhennecessary.directionstransportationcommutepollutiondowntownfavortrafficintersectionCan I ask you a(n) ________? I need help moving house.
Directions:Pleasecompletethesentenceswiththewordsorexpressionsinthebox.Makechangeswhennecessary.directionstransportationcommutepollutiondowntownfavortrafficintersectionIt takes two hours for Kevin to ________ here every day. No wonder he is often late.