下列哪些传染病,外周血白细胞总数常常是升高的()
A.伤寒
B.流行性出血热
C.登革热
D.流行性乙型脑炎
E.恙虫病
参考答案:B, D
--Have you any oranges and apples?
--__________
A.Yes, madam, on the second shelf over there
B.The oranges are very cheap.
C.You like apples, don’t you?
D.Of course, we have some fruits.
一物体沿直线以v=3t+2(t单位:s,v单位:m/s)的速度运动,则该物体在3s~6s间的运动路程为 [ ]
A.46m
B.46.5m
C.87m
D.47m