急性心肌梗死时血清酶出现最早的是（）。 A．ASTm B．LD C．α-HBD D．

在观察“磁场对通电直导线的作用”活动中，小明按照图示组装实验器材．

（1）小明把一根轻质的铝棒作为直导线放在蹄形磁体的磁场里，接通电源，看到直导线向左运动．说明磁场对通电导线有________的作用．

（2）若只将磁体的两极对调，接通电源，观察到直导线向________（选填“左”或“右”）运动．

（3）观察“磁场对通电直导线的作用”活动后．小明提出：磁场对通电导线作用力的大小与什么因素有关？

思考后认为可能影响磁场对电流作用的因素有：直导线的长度、磁场的强弱和导线的电流大小．

请在图中器材的基础上，添加适当的器材，设计一个简单实验，探究磁场中通电导线作用力大小与导线中电流的大小是否有关．

简要做法：_____________________________________

如何判断：_____________________________________

液压传动的机械能和液体压力能之间的转换是通过（）的变化来实现的。

A、密闭容积

B、容器

C、液压油

D、温度

For all the dinner table, a glass of milk seems to be a constant , at least it was when I was growing up．It was widely believed that milk was integral in building strong bones and teeth. There’s no doubt that dairy products(乳制品), and milk in particular, are high in protein and calcium, and most milk products are supplemented with Vitamin D and A．

While it’s well known that our bones need calcium, some studies suggest that high calcium intake doesn’t necessarily lower a person’s risk for fractures（骨折）． A Harvard study found that people who drank two or more glasses of milk had no greater protection from breaking a bone than those who drank a glass or less a week．

There’s no doubt that we need calcium, Some anti-dairy supporters claim that dairy can lead to heart disease． Much of this claim is based on high fat and high dairy products, like cheeses and creams, which may indeed contribute to cardiovascular problems． Some studies have linked high milk intakes with a risk of prostate cancer; this seems to be caused by high-fat dairy products, not dairy in general．

Although milk was always regarded as one of the most important thing we need for our bones, yet least promoted, factors involved in strengthening bones. Perhaps we should think of dairy as less like a nutrient and more like a food. If you like it, eat it．If not, find some others． Because some claims may not be completely true, when I eat a cream, I’m not thinking about calcium, protein, or any such thing. I’m thinking delicious．

61．Which of the following is TRUE on the milk?

A．The more milk you drink, the more risk for fractures you might be．

B．The more milk you drink, the less risk for fractures you might be．

C．The less milk you drink, the less risk for fractures you might be．

D．There is no link between them．

62．Some anti-dairy supporters claim that dairy can lead to except______．

A．cardiovascular problems                     B．heart disease

C．prostate cancer                             D．stomach cancer

63．The underlined words “some others” in the last paragraph refer to_____．

A．dairy products               B．milk               C．food               D．cream

64．What’s the author’s attitude towards milk?

A．He doesn’t like milk any more

B．He used to drink milk as a child．

C．He regards milk as a nutrient．

D．He always cares about calcium, protein when he eats something．

65．We can learn from the text that_____

A．All the claims are not completely true ．

B．High milk intakes can lead to cancer．

C．It’s necessary for you to reduce milk intakes．

D．Give up milk for your health．

电力电缆第一种工作票流程包括哪些环节？

女性，47岁。分娩3次，曾因尿失禁行 * * 悬吊手术，术后尿失禁症状未解除，出现明显尿急。患者由此精神极度紧张。尿常规检查正常。

检查残余尿量为225ml。根据患者情况，宜采取的治疗方法是（）

A.自我间歇导尿法

B.耻骨上膀胱穿刺引流

C.手术拆除吊带

D.心理治疗

E.口服抗胆碱能药物