肺泡隔中有()、()、()和()等结构。

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问题:

肺泡隔中有()、()、()和()等结构。

考点:生物学组织学与胚胎学组织学与胚胎学题库
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已知25℃时有关弱酸的电离平衡常数:

弱酸化学式CH3COOHHCNH2CO3
电离平衡常数(25℃)1.8×10-54.9×10-10K1=4.3×10-7

K2=5.6×10-11

则下列有关说法正确的是(  )

A.等物质的量浓度的各溶液pH关系为:pH(NaCN)>pH(Na2CO3)>pH(CH3COONa)

B.NaHCO3和Na2CO3混合溶液中,一定存在c(Na+)+c(H+)=c(OH-)+c(HCO3-)+2c(CO32-

C.amol•L-1HCN溶液与bmol•L-1NaOH溶液等体积混合后,所得溶液中c(Na+)>c(CN-),则a一定大于b

D.冰醋酸中逐滴加水,则溶液的导电性、醋酸的电离度、pH均先增大后减小

题型:填空题

How I wish I ___ your advice when you first warned me.

A.took

B.should take

C.had taken

D.have take

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Scholars and researchers have tried to discover what personality characteristics go along with success in intercultural experiences. Their findings have often been unclear or incomplete. But three characteristics stand out in their reports: patience, a sense of humor, and the awareness of being unclear.

Patience, of course, is the ability to keep calm even when things do not go as one wants them to, or hopes they will, or has even been sure they will. Impatience sometimes brings improvements in relations with other people, but usually it does not.

A person with a sense of humor is less likely to take things too seriously and more ready to see the humor in his own reactions than a humorless person. The value of a sense of humor really needs to be paid more attention to.

The awareness of being unclear is a more difficult concept than patience or a sense of humor. Foreigners often find themselves in situations that are unclear to the newcomers. That is, they do not know what is happening in the situation. Perhaps they do not understand the local language well enough, or they do not know how some system or organization works, or they can’t be sure of different people’s roles in what is going on. “It’s like I just got here from the moon,” a Chinese graduate student who newly arrived in the United States said, “things are just so different here.”

小题1:The passage mainly tells us             .

A.that it’s not easy to travel abroad

B.that humor is very important in communication

C.of some characteristics in dealing with foreigners

D.of three main ways useful for communicating with foreigners小题2:According to the passage, what characteristic should be most focused on?

A.Patience.

B.The awareness of being unclear.

C.The sense of humor.

D.Understanding each other.小题3:“The awareness of being unclear” refers to           .

A.knowing the meaning of an exact situation

B.not stating clearly what happens

C.realizing the possible misunderstanding in a situation

D.being aware of the unclear situation小题4:According to the writer, the Chinese students is           .

A.a hard-working student

B.recently back from the moon

C.interested in the study of moon

D.not used to the culture in America小题5:Which of the following can best sum up the passage?

A.It is necessary to learn the language before you go to the country.

B.Americans are used to the culture of other countries.

C.One needs many characteristics to live in a foreign country.

D.To live in a foreign land one should get fully prepared.[

题型:填空题

ABC=45°;ADC为一圆弧,其圆心在BC边的中点.此玻璃的折射率为1.5.P为一贴近玻璃砖放置的、与AB垂直的光屏.若一束宽度与AB边长度相等的平行光从AB边垂直射入玻璃砖,则(  )

A.从BC边折射出束宽度与BC边长度相等的平行光

B.屏上有一亮区,其宽度小于AB边的长度

C.屏上有一亮区,其宽度等于AC边的长度

D.当屏向远离玻璃砖的方向平行移动时,屏上亮区先逐渐变小然后逐渐变大

题型:填空题

"大历十才子"出现在()。

A.初唐

B.中唐

C.盛唐

D.晚唐

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