诊断成人腰椎结核最可靠的依据是
A.低热、盗汗、乏力和食欲不振
B.贫血、血沉加快
C.腰痛、拾物实验阳性
D.X线片示椎间隙狭窄,椎体边缘模糊
E.结核菌素试验阳性
参考答案:D
—Where are Jim and Tom? Their mother is looking for them.
—They _____ over there.
A. run B. runs C. are running
下面所说的现象与压强这个概念有关的是( )
(1)坐在沙发上比坐在木椅上舒服;
(2)穿高跟鞋的姑娘会在泥地上留下较深的脚印;
(3)在固定家具的螺丝帽下面垫上个较大的垫圈;
(4)切菜刀的刀刃要磨得比较锋利.
A.(2)(3)
B.(1)(2)
C.(2)(4)
D.都是