—Did it ____ you 4 hours to get to Shang

集体合同是根据劳动法律法规签订的，内容包括（）。

A.工作时间

B.劳动报酬

C.休息休假

D.劳动安全卫生

E.保险福利

△ABC的顶点B（-4，0），C（4，0），△ABC的内切圆圆心在直线x=1上，则顶点A的轨迹方程是______．

我国最早建立高新技术试验区的是[ ]

A．上海淮海路                  

B．北京中关村  

C．南京珠江路                  

D．天津高新技术产业园区

Boys' schools are the perfect place to teach young men to express their emotions and involve them in activities such as art, dance and music.

Far from the traditional image of a culture of aggressive masculinity (阳刚), the absence of girls gives boys the chance to develop without pressure to obey a stereotype（陈规旧俗），a US study says.

Boys at single-sex schools were said to be more likely to get involved in cultural and artistic activities that helped develop their emotional expressiveness, rather than feeling they had to obey the "boy code" of hiding their emotions to be a "real man".

The findings of the study go against received wisdom that boys do better when taught alongside girls.

Tony Little, headmaster of Eton, warned that boys were being failed by the British education system because it had become too focused on girls. He criticized teachers for failing to recognize that boys are actually more emotional than girls.

The research argued that boys often perform badly in mixed schools because they become discouraged when their female peers do better earlier in speaking and reading skills.

But in single-sex schools teachers can tailor lessons to boys' learning style, letting them move around the classroom and getting them to compete in teams to prevent boredom, wrote the study's author, Abigail James, of the University of Virginia.

Teachers could encourage boys to enjoy reading and writing with "boy-focused" approaches such as themes and characters that appeal to them. Because boys generally have more acute vision learn best through touch, and are physically more active, they need to be given "hands-on" lessons where they are allowed to walk around. "Boys in mixed schools view classical music as feminine (女性的) and prefer the modern type in which violence and sexism are major themes, "James wrote.

Single-sex education also made it less likely that boys would feel they had to obey a stereotype that men should be "masterful and in charge" in relationships. "In mixed schools boys feel forced to act like men before they understand themselves well enough to know what that means," the study reported.

小题1:The author believes that a single-sex school would ______.

A．force boys to hide their emotions to be "real men"

B．encourage boys to express their emotions more freely

C．help to cultivate masculine aggressiveness in boys

D．naturally reinforce in boys the traditional image of a man小题2:It is commonly believed that in a mixed school boys ______.

A．perform relatively better

B．grow up more healthily

C．behave more responsibly

D．receive a better education小题3:What does Tony Little say about the British education system?

A．It fails more boys than girls academically.

B．It focuses more on mixed school education.

C．It fails to give boys the attention they need.

D．It places more pressure on boys than on girls.小题4:According to Abigail James, one of the advantages of single-sex schools is ______.

A．teaching can be tailored to suit the characteristics of boys

B．boys can focus on their lessons without being distracted

C．boys can choose to learn whatever they are interested in

D．teaching can be designed to promote boys' team spirit小题5:Which of the following is characteristic of boys according to Abigail James' report?

A．They enjoy being in charge.

B．They obey stereotypes.

C．They are violent and sexist.

D．They have sharper vision.

在进行垃圾样品消解时，在水润湿后的样品中加入3mL（）、8～10滴高氯酸，然后于电热板上进行加热。

A.浓盐酸

B.浓硫酸

C.浓硝酸