大便隐血试验呈持续阳性常提示()A.急性胃粘膜病变 B.胃溃疡 C.十二指肠球部溃疡 发布时间:2017-06-27 23:36 │ 来源:www.tikuol.com 题型:单项选择题 问题: 大便隐血试验呈持续阳性常提示()A.急性胃粘膜病变B.胃溃疡C.十二指肠球部溃疡D.慢性萎缩性胃炎E.胃癌
题型:单项选择题 如图示,为一个封闭的盒子,面板上有两个灯泡M和N以及3个接线柱A、B、C,盒内有电源,并以导线在盒内将灯、接线柱、电源相连,今在盒外,用导线将A、B两个接线柱相连,M、N均不发光;用导线将B、C相连,则灯N发光而M不发光;用导线将A、C两接线柱相连,则灯M发光而N不发光,据上面的结果,探究出电路的组成,并将盒内的电路画出来. 查看答案
题型:单项选择题 如图所示,一根绝缘杆长为L,两端分别带等量异种电荷,电荷量绝对值为Q,处在场强为E的匀强电场中,杆与电场线的夹角为60°,若是杆沿顺时针方向转过60°(以杆上某一点为圆心转动),则下列叙述正确的是( )A.电场力不做功,两电荷的电势能不变B.电场力做的总功为Eql2,两个电荷的电势能减少C.电场力做的总功为-Eql2,两个电荷的电势能增加D.电场力做的总功大小跟转动轴有关 查看答案
题型:单项选择题 补全对话。用面方框中的选项中的正确句子补全对话。一项为多余选。A: Let's make fruit salad.B: OK. Do you have bananas?A: Yes, I do. B: 1. A: Three. B: That sounds right. 2. A: A watermelon. And we need some honey, apples, yogurt and … B: 3. A: A cup. Let me see, what else do we need? 4. B: I think so. How many oranges do we need? A: Only one. And we need honey. B: How much honey do we need? A: 5. B: This is going to taste great! A. How much yogurt do we need? B. Where are your oranges? C. Oh, do you have any oranges?D. What else? E. How many bananas do we need? F. Two teaspoons 查看答案