在一台四行程活塞式发动机中，气门重叠开启，此时活塞应在（）。A.进气行程 B.进气行

高压控制柜内的温度，不得超过20℃，否则应打开通风机通风冷却。（）

案例摘要：患者，女性，45岁。近两年经常头痛、头晕，耳鸣，心悸，记忆力减退，手脚麻木，近1年来于清晨睡醒时经常出现心前区疼痛并向左肩部放射。就诊时，血压170／105mmHg，心电图表现为弓背向下型S-T段抬高

下列叙述哪些是错误的（）

A.硝酸甘油主要作用为松弛血管平滑肌，舒张全身动脉和静脉，可降低前后负荷

B.硝酸甘油剂量过大可使血压过度降低，心率减慢

C.硝酸甘油可用供静脉注射的注射剂也可口服片剂

D.硝酸甘油通过降低心肌耗氧量及改善缺血区心肌血量丽发挥其抗心绞痛作用

E.硝酸甘油连续用药2～3周可出现耐受性，停药1～2周后可恢复，故宜用间歇疗法

Parents are often amazed at how fast their child grows and develops. New research has determined that the ability to quantify may develop much sooner than most parents realize.

Kristy Vanmarle, professor of the University of Missouri, has determined that contrary to what previous studies have shown, infants（婴儿）are able to quantify substances（物质）—like sand or water—as early as 10 months. As long as the difference between the two substances is large enough, infants will choose the larger amount, especially when it comes to food.

With the assistance of her team researchers, Vanmarle tested the quantifying skills of babies by presenting them with two cups: one containing a small amount of food, and one containing a larger amount. Consistently, the babies chose the larger amount.

“Several studies throughout the last 15 years have shown that infants are very good at telling how many objects they see; however, infants don’t seem to count things like water or sand,” Vanmarle said. “What we’re saying is that they can quantify substances; it’s just much harder. The infants can see how much food goes into each cup and compare that in their memories. They decide which amount is larger, and they almost always select the larger one.”

“This information further refutes（驳斥）the long-held idea that babies know nothing of the world,” Vanmarle said.

“Since psychologists have begun studying infants with sensitive measures, we’ve discovered a lot of early abilities. I think for parents, it should be exciting to know that there’s somebody in there that has some fundamental and basic knowledge of the world, and that knowledge is guiding their development,” Vanmarle said.

In the future, Vanmarle says this kind of study could be linked to a child’s progress in math-related skills, although programs marketed to increase those abilities, such as “Baby Einstein,” still have mixed reviews when it comes to academic study.

小题1: The quantifying ability refers to the ability to     .

A．choose between different substances

B．describe the quantity of something

C．get much knowledge of the world

D．obtain math-related skills小题2: What is mainly talked about in Paragraph 4?

A．The process of doing research.

B．The final choice of infants.

C．The scientific findings.

D．The observation of infants’ behavior.小题3: Babies choose the larger amount of food     .

A．through their natural abilities

B．with the help of parents

C．on personal preference

D．by saying numbers小题4:We can learn from the text that     .

A．some parents don’t care about their kids

B．scholars disagree on baby-training programs

C．little research has been done on infants

D．people used to think the world is known to babies小题5:What’s the best title of the text?

A．Unique Quantifying Methods

B．Amazing Baby-training Ideas

C．Early Human Abilities

D．Breakthrough in Baby Studies

医学伦理学原则中的最高层次是（）

A.不伤害病人

B.有利于病人

C.全心全意为人民身心健康服务

D.尊重病人的自主性

E.公正地对待病人

一个字长为6位的无符号二进制数能表示的十进制数值范围是( )。

A．0～64

B．1～64

C．1～63

D．0～63