皮皮学,免费搜题
登录
搜题
【简答题】
Early in the morning, at noon, or in the evening in big cities and in the countryside, all over the United States, you can see Americans running — men and women, young and old. People run — along the beaches of California, Central Park in New York, down quiet streets in small towns or at the gym. Some people even run in living rooms. Running wasn’t so popular in the past. In the 1960s, runners were mostly athletes and healthy strong people. When people saw a runner, they used ,“Hey, what’s the hurry for?”or they might say to ,“Is he crazy?”At that time, women almost never ran. If they did, they might be laughed at. But today all these have Men and women of all enjoy running. Doctors say many of the health problems in the United States these bad habits: eating too much, smoking cigarettes, and taking exercise. Doctors tell us,“Eat less, don’t smoke, and exercise more. ”Running is a good exercise it helps build strong hearts and lungs. It also helps most people lose weight. 小题1: A.anywhere B.somewhere C.everywhere D.nowhere 小题2: A.among B.through C.with D.on 小题3: A.our B.your C.his D.their 小题4: A.to asking B.to speak C.to speaking D.to ask 小题5: A.them B.themselves C.their D.they 小题6: A.changed B.stopped C.worked D.done 小题7: A.people B.cities C.villages D.ages 小题8: A.come from B.look for C.care for D.think of 小题9: A.few B.many C.much D.little 小题10: A.how B.where C.because D.until
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【单选题】造成流脑周期性流行的主要因素是
A.
细菌毒力增强
B.
菌群变迁规律的改变
C.
人群带菌率增高
D.
人群免疫力下降
E.
普遍进行预防接种
【简答题】克莱姆法则表明:当齐次线性方程组的系数行列式____(填 “等于”或“不等于”)零时,该方程组仅有零解.
【判断题】NPN型三极管的集电区和发射区都是N型半导体,因此可以将三极管的C、E两个电极交换使用。
A.
正确
B.
错误
【判断题】NPN型三极管的发射极和集电极都是从N型半导体区域引出,故两电极可以互换使用
A.
正确
B.
错误
【判断题】NPN型晶体管的发射区和集电区都是N型半导体,所以可以互换使用。
A.
正确
B.
错误
【单选题】造成流脑周期性流行的主要因素是
A.
细菌毒力增强
B.
菌群变迁规律的改变
C.
人群带菌率增高
D.
人群免疫力下降及新易感人群聚集
E.
普遍进行预防接种
【判断题】NPN型晶体三极管的发射区和集电区都是N型半导体,所以,它的发射区和集电区可以互换。
A.
正确
B.
错误
【判断题】梦工厂目前没有制作过 2 维动画片。
A.
正确
B.
错误
【简答题】齐次线性方程组 仅有零解,则该方程组的系数矩阵 。(填“可逆”或“不可逆”)
【判断题】NPN型晶体三极管的发射区和集电区都是N型半导体,因此发射极和集电极可以互换使用
A.
正确
B.
错误
相关题目: