在比例控制系统中，当输入的偏差变化了20%，而调节器输出变化了5%，则比例带PB为（

关于绒毛膜癌及侵蚀性葡萄胎临床分期

Ⅱb期

A．病变转移到肝脏
B．病变转移至 * *
C．肺内转移病灶总面积大于一侧肺的1/2
D．病变转移至宫旁组织及附件
E．病变局限于子宫

男性，50岁。因肾病综合征入院做肾活检，病理显示膜性肾病。治疗过程中突然出现双侧肾区疼痛，尿量减少，低热，蛋白尿显著增多伴肉眼血尿，下肢水肿加重，肾功能较前稍有减退。B超示双肾大小较前有所增大。此时最可能的原因是（）。

A.伴发肾石症

B.原有膜性肾病加重

C.伴发泌尿系肿瘤

D.肾静脉血栓形成

E.泌尿系结核病

夏秋季伤寒主要的病理特征是（）

A.全身单核巨噬细胞增生性反应

B.回肠末端以淋巴结病变最显著

C.第1周肿大的淋巴结坏死

D.第3周溃疡逐渐愈合

E.仅有脾的病变，肝无明显病变

阅读理解。

     Cheating can happen in a lot of different ways. When people cheat, it's not fair to other people, like

the kids who studied for the test or who were the true winners of a game.

     Many people like the action of cheating. It makes difficult things seem easy, like getting all the right

answers on the test. But it doesn't solve the problem of not knowing the material and it won't help on the

next test -unless the person cheats again.

     Some people lose respect for cheaters and think less of them. The cheaters themselves may feel bad

because they know they are not really earning that good grade. And, if they get caught cheating, they will

be in trouble at school, and maybe at home, too.

     Some kids cheat because they're busy or lazy and they want to get good grades without spending the

time studying. Other kids might feel like they can't pass the test without cheating. Even when there seems

to be a "good reason" for cheating, cheating isn't a good idea.

     If you were sick or upset about something the night before and couldn't study, it would be better to

talk with the teacher about this. And if you don't have enough time to study for a test because of swim

practice, you need to talk with your parents about how to balance swimming and school.

     A kid who thinks cheating is the only way to pass a test needs to talk with the teacher and his or her

parents so they can find some solutions(解决办法) together. Talking about these problems and working

them out will feel better than cheating.

1.The author thinks that when kids cheat in class,______.

A. it is unfair to other people                 

B. it does harm to their heath

C. teachers should punish them                

D. teachers shouldn't stop them at once

2. Some students like cheating mainly because_______.

A. the material in the test is very difficult        

B. they want to do better than the others

C. cheating can make hard things seem very easy  

D. they have little time to study their lessons

3.The fourth paragraph mainly tells us______.

A. cheating isn't a good idea                  

B. why kids cheat in the test

C. some kids can't pass the test without cheating  

D. some kids don't spend the time studying

4. In the passage those cheaters are advised to_______.

A. spend more time on school than on sports    

B. find good solutions instead of cheating

C. try hard to be intelligent rather than lazy      

D. ask their classmates for good methods of study

下列疾病中适宜开展二级预防的是（）

A.心肌梗死

B.色盲

C.胰腺癌

D.肺结核

E.麻疹