呼出的气体中,氧气的含量_________,二氧化碳的含量_________(

题型:选择题

问题:

呼出的气体中,氧气的含量_________,二氧化碳的含量_________(  )

A.增加,减少

B.减少,增加

C.不变,不变

D.减少,减少

考点:肺与外界的气体交换
题型:选择题

关于施工成本控制依据的进度报告的说法,错误的是()。

A.进度报告提供了对应时间节点的工程实际完成量

B.进度报告提供了工程施工成本的实际支付情况

C.进度报告是发生重大损失后采取有效措施的依据

D.成本管理人员利用进度报告分析实际情况与成本计划偏差,找出存在的隐患

题型:选择题

下面有五则寓意。阅读A-F的寓言故事,然后匹配与之对应的寓言故事。其中有一个故事是多余的。

( )1. Not everything you see is what it appears to be.

( )2. He who loses freedom loses all.

( )3. Misfortune tests true friendship.

( )4. Union gives strength.

( )5. Precious things are for those that can prize them

                                                                            A

     A wolf was almost dead with hunger. A housedog saw him, and asked, "Friend, your irregular life will

soon ruin you." "Why don't you work steadily as I do, and get your food regularly?' "I would have no

objection," said the wolf, "if I could only get a place." "I will help you," said the dog. "Come with me to my

master, and you shall share my work." So the wolf and the dog went to the town together. On the way the

wolf saw that there was no hair around the dog's neck. He felt quite surprised, and asked him why it was

like that? "Oh, it is nothing," said the dog. "Every night my master puts a collar around my neck and chains

me up. You will soon get used to it." "Is that the only reason?" said the wolf. "Then good-bye to you, my

friend. I would rather be free."

                                                                            B

     Two men were traveling together, when a bear suddenly met them on their path. One of them climbed

up quickly into a tree and hid himself in the branches. The other, seeing that he must be attacked, fell flat

on the ground, and when the bear came up and felt him with his nose, and smelt him all over, he held his

breath, and pretended to be dead as much as he could. The bear soon left him, for he will not touch a dead

body. When he disappeared, the other traveler slid down from the tree, and asked his friend what it was the

bear had whispered in his ear. "He gave me this advice," his companion replied. "Never travel with a friend

who deserts you at the approach of danger."

                                                                            C

     A prince had some monkeys trained to dance. Being naturally good at learning, they showed themselves

most excellent pupils, and in their rich clothes and masks, they danced as well as any of the courtiers. Their

performance was often repeated with great applause, till on one occasion a courtier, bent on trick, took from

his pocket a handful of nuts and threw them upon the stage. The monkeys at the sight of the nuts forgot their

dancing and became (as indeed they were) monkeys instead of actors. Pulling off their masks and tearing

their robes, they fought with one another for the nuts. The dancing show thus came to an end in the laughter

and jokes of the audience. 

                                                                            D

     A cock was once walking up and down the farmyard among the hens when suddenly he noticed something

shinning in the grass. "Ho! ho!" said he, "that's for me," and soon rooted it out from beneath the grass. It

turned out to be but a pearl that by some chance had been lost in the yard. "You may be a treasure," sighed the

cock, "to man, but for me I would rather have a single corn." 

                                                                            E 

     Lion was awakened from sleep by a Mouse running over his face. Rising up in anger, he caught him and

was about to kill him, when the Mouse pitifully begged, saying:"If you would only spare my life, I would be

sure to repay your kindness." The Lion laughed and let him go. It happened shortly after this that the Lion was

caught by some hunters, who tied him by strong ropes to the ground. The Mouse, recognizing his roar, came

up, and bit the rope with his teeth, and setting him free, exclaimed:"You joked the idea of my ever being able

to help you, not expecting to receive from me any repayment of your favor. But now you know that it is

possible for even a Mouse to grand benefits on a Lion."

                                                                            F

     An old man on the point of death had his sons aside to give them some parting advice. He ordered his

servants to bring in a bunch of sticks, and said to his eldest son:"Break it." The son strained and strained, but

with all his efforts was unable to break the Bundle. The other sons also tried, but none of them was successful

"Untie it," said the father, "and each of you take a stick." When they had done so, he called out to them:"Now,

break," and each stick was easily broken.

题型:选择题
求如图所示的交变电流的有效值,其中每个周期的后半周期的图象为半个周期的正弦曲线(   )

A.5A

B.5A

C.5/2A

D./2A

题型:选择题

若需单独测定游离药物浓度,则样品去蛋白预处理时不能采用()

A.沉淀离心法

B.超速离心法

C.电泳法

D.超滤法

E.层析法

题型:选择题

根据《钢轨探伤管理规则》规定,焊缝探伤前应对焊缝处怎样处理?

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