8岁儿童正常舒张压应约为（） A.48mmHg B.52mmHg C.56m

乳腺X线摄影机中使用的钼靶X线管的特点是（）

A.功率小、焦点小、几何尺寸小、管壳的射线输出部位使用钼窗

B.功率大、焦点小、几何尺寸小、管壳的射线输出部位使用铍窗

C.功率小、焦点大、几何尺寸小、管壳的射线输出部位使用铍窗

D.功率小、焦点小、几何尺寸小、管壳的射线输出部位使用铍窗

E.功率小、焦点小、几何尺寸大、管壳的射线输出部位使用钼窗

男，36岁，1周前出现化脓性扁桃体炎，近1天，突然出现左下颌下肿物、剧痛，伴高热，查体：体温39℃，左下颌下肿物，直径 2cm，红肿、压痛，红肿中央区可及波动感。考虑诊断是

A．急性化脓性淋巴结炎

B．口底化脓性蜂窝织炎

C．项痈

D．淋巴结结核

E．颈深部化脓性蜂窝织炎

American schools do not have separate classes for boys and girls. If boys want to cook or to sew, they can learn these things in classes that are no longer just for girls. If girls want to repair cars, they can now learn this in school. Most students like to have boys and girls on the same baseball team.

Many boys and girls dress alike in school. They were blue jeans and sport shirts. Some have long hair and some have short hair. Sometimes a boy has longer hair than a girl.

Even the language is different. Students learn to say fire fighter instead of fireman, police officer instead of policeman, and letter carrier instead of mailman. A person does not need to be a man to fight a fire or to deliver the mail.

Most people think that these changes are good. They give all people an equal chance to be happy and to do what they want to do with their lives. Fathers like to tell their sons that they can grow up to be president. Today, mothers can tell the same things to there daughters.

小题1:Students in American schools learn to say police officer instead of policeman because____.

A．boys don’t like to be a policeman

B．girls don’t like to be a policeman

C．police officer sounds better than policeman

D．a police officer can be a policeman or policwoman小题2: We may infer from the text that in the past in American schools____.

A．there were many differences between boys and girls

B．boys could do everything but girls couldn’t

C．boys and girls were the same in everything

D．girls only learned how to sew and cook小题3:The underlined word “ They” in the last paragraph refers to ____.

A．American schools

B．these changes

C．most people

D．American students小题4:What does “mailman” mean?

A．Milkman

B．Postman

C．Writer

D．Reporter小题5:What do most people think of the changes in American schools?

A．Surprising

B．Strange

C．Good

D．Bad

短接开关设备或阻波器的分流线截面和两端线夹的载流容量，应满足最大负荷电流的要求。

《中国南方电网有限责任公司电力安全工作规程》第20.5.1条规定：梯子上的高处作业，梯子应坚固完整，有（）

A、防尘措施

B、加固措施

C、防滑措施

D、足够长度