(1)心电图仪是用来记录心脏生物电的变化规律的装置,下面是甲、乙两人在同一台心电

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问题:

(1)心电图仪是用来记录心脏生物电的变化规律的装置,下面是甲、乙两人在同一台心电图机上作出的心电图分别如图甲、乙所示,医生通过测量后记下甲的心率是60次/分.试分析:甲的心动周期为______,该心电图机图纸移动的速度为______,乙的心率为______.

(2)光热转换是将太阳光能转换成其他物质内能的过程,太阳能热水器就是一种光热转换装置,它的主要转换器件是真空玻璃管,这些玻璃管将太阳光能转换成水的内能.真空玻璃管上采用镀膜技术增加透射光,使尽可能多的太阳光能转化为______,这种镀膜技术的物理学依据是______.

考点:波长、频率和波速能量守恒定律、第一类永动机
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WHO癌痛之阶梯疗法第一阶段是用()。

A.弱阿片类药

B.强阿片类药

C.非阿片类药

D.心理治疗

E.神经阻滞

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A neighbor of mine, while visiting his mother in Boston, took her to a shoe store to buy a new pair of shoes. While she was trying on different styles, my neighbor took the manager aside. “When she picks out a pair that she likes,” he said, “Just tell her that the price is 12 dollars. I’ll pay the regular(正常的)price. I don’t care how much it is.”

The following week, my neighbor was walking by the shoe store and the manager recognized him and called him in.

“What’s the problem?” asked my neighbor as he entered the store.

“Wasn’t my check any good?”

“That’s not it,” answered the manager, “The problem is that your mother is bringing all her friends in for those 12-dollar shoes!”

小题1:My neighbor went to Boston ________.

A.to buy shoes for his mother

B.to see his mother

C.to pay for the shoes he had bought for his mother

D.to see the manager of the shoe store小题2:The regular price my neighbor had paid must be _______.

A.12 dollars

B.lower than 12 dollars

C.higher than 12 dollars

D.unknown to himself at all小题3:It seems very probable that my neighbor wanted to _______.

A.please his mother

B.cheat his mother

C.cheat the manager

D.please his mother’s friends小题4:The manager called my neighbor in when he saw him because______.

A.he didn’t have enough shoes for his customers(顾客)

B.my neighbor’s mother had taken a wrong pair of shoes

C.there was something wrong with his check

D.he found it hard to satisfy his customers小题5:What do we know about the character(个性) of my neighbor’s mother?

A.She would like to buy expensive things.

B.She would like to buy cheap things.

C.She would like to help others when they’re in trouble.

D.She would like to have her son pay for her shopping.

题型:填空题

刮板输送机沿倾斜向下的运输时,煤层倾角不得超过()。

A、20°

B、25°

C、30°

D、35°

题型:填空题

呋喃与丙烯醛在加热下反应,生成产物的结构式是().

题型:填空题

软杀伤型的信息化武器是指()。

A.计算机病毒武器

B.电子攻击型信息武器

C.装有大量的电子信息传感设备,并与C4KISR系统联网的武器系统

D.以计算机病毒武器为代表的网络攻击型信息武器和以电子战武器有代表的电子攻击型信息武器

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