内齿铣鞋是依靠（），对不规则底鱼顶，进行周向切削。 A.坚硬的铣齿 B.高强度的铣齿

碘缺乏病发病早期的形态变化为（）.

A．肿胀性甲状腺肿 

B．弥漫性甲状腺肿 

C．结节性甲状腺肿 

D．囊性甲状腺肿 

E．甲状腺灶性增生

Sitting on a chair all day in school can make anyone want to move around. So, more and more teachers are letting students have a ball. By sitting on exercise balls instead of chairs , teachers find students’ posture(姿势) and attention improve.

Dottie Pownall, a fifth-grade teacher in West Virginia, USA, has been using balls as chairs since December 2008. “The students love them”, she says. Pownall took a survey(调查) of her students. She found that 80% of the students thought sitting on the balls helped them pay more attention to what they were learning.

The teacher, Pisa Witt, felt so strongly about the use of balls as chairs, she started Witt Fitt. This company encourages the use of the balls. And the company educates not only teachers but also students on how to use them. “Our products are used in 24 states, three provinces in Canada, Puerto Rico (波多黎各) and Japan,” says Witt, “ Research shows that sitting on the balls makes them sit up straighter（直的）. You can slouch(低头垂肩地坐)on a ball,” says Witt, “but it feels bad.” Because the students are moving, their blood (血液) increases. That carries more oxygen( 氧气) to the brain , so the kids have more energy and can pay attention longer.

“Besides, they’re fun.” says Pownall.

小题1:What will happen if a student sits on a chair all day in school? The student will_________.

A．pay more attention to his lessons

B．be fun

C．like to move around

D．sit up straighter小题2:How long has Dottie Pownall used the balls?

A．About four years.

B．Only one year.

C．In 2008.

D．Since he was a fifth-grade teacher.小题3:In how many countries are the balls used as the students’ chairs?

A．Four.

B．Three.

C．Two.

D．One.小题4:Teachers choose balls instead of chairs because sitting on balls helps the kids _________.

A．improve the students’ posture and attention

B．slouch on the chairs

C．have fun

D．Both A and C are correct answers小题5:Which is better for kids to study in class, sitting on a chair or sitting on a ball?

A．Sitting on a chair.

B．Sitting on a ball.

C．They are the same.

D．We don’t know.

痈(carbuncle)

1780年，英国报馆经理雷克斯首创( )，以利用礼拜日对童工进行指导和教育。

A．实科中学

B．文法学校

C．慈善学校

D．主日学校

反复浮肿伴低蛋白血症高胆固醇血症，24h尿蛋白定量＞100mg/kg，症见面色胱白，神疲畏寒，食欲减退，四肢不温，舌淡苔白，脉细无力。其中西医病证诊断是( )

A．肾病综合征，脾肾阳虚型
B．肾病综合征，肝肾阴虚型
C．急性肾炎，风水相搏型
D．急性肾炎，湿热内侵型
E．肾病综合征，脾虚湿困型