室内消火栓、水带和水枪之间一般采用（）接口连接。A、螺纹B、内扣式C、法兰D、焊接

N_A表示阿伏加德罗常数的值，下列说法正确的是

A． 5.6 g铁粉在0.1mol氯气中充分燃烧，转移电子数为0.3N_A

B． 12.5mL 16mol·L^-1浓硫酸与足量铜反应，转移电子数为0.2N_A

C．7.8g Na₂S和Na₂O₂的混合物中含有的阴离子数等于0.1N_A

D．0.5mol雄黄（As₄S₄，结构如上图）含有N_A个S—S键

女性，22岁。低热、消瘦，闭经，偶有轻咳2月余就诊。结核菌素试验72小时测量肿结直径20mm×22mm(强阳性)。下列处理哪一项是合理的

A．结核病诊断成立，立即开始抗结核病治疗

B．提示结核病可能，应进一步寻找病灶

C．试验性抗结核病治疗

D．试验性抗感染治疗，若无效则改抗结核病治疗

E．试验性联合抗生素和抗结核治疗

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.[

养鸡场有一台电热孵卵器，其发热体由两条110Ω的电阻丝并联组成．如果通过发热体的电流是3A，通电10s该发热体产生的热量为______J．

冷轧厂1780机组焊机正常工作时被焊材料的厚度条件为d2-d1<0.6mm和d2<1.2d1。