下列实验中，①pH试纸的使用 ②过滤 ③蒸发④配制一定物质的量浓度溶液，均用到的 发布时间：2017-07-17 20:04 │ 来源：www.tikuol.com 题型：选择题 问题： 下列实验中，①pH试纸的使用 ②过滤 ③蒸发 ④配制一定物质的量浓度溶液，均用到的仪器是[ ]A．蒸发皿 B．玻璃棒 C．试管 D．分液漏斗
题型：选择题 完形填空。 Do you like to play outside? Do you like to 1 ? Do you like to play with a ball? You can do all these 2 if you play football. Football players 3 throw (扔) and catch the ball. They cannot touch the ball with their 4 . They can only kick (踢) the ball. If you have 5 teams, you can play football. There is a goal (球门) for each team. Some goals are big net and other goals are only lines (线条). The players on one team want to kick the ball into the other 6 . When the ball goes into the other's goal, they make one point (得一分). Lots of people play 7 . You can be 8 or old, tall or short. Football is easy to play. All you need is a ball and a place to play. Then find enough (足够的) 9 to play. Keep playing football every day, and you will be very 10 . ( )1. A. sleep ( )2. A. activities ( )3. A. can ( )4. A. legs ( )5. A. two ( )6. A. goal ( )7. A. volleyball ( )8. A. young ( )9. A. workers ( )10. A. short B. sit B. tricks B. will B. hands B. three B. room B. baseball B. small B. teachers B. unhappy C. run C. jobs C. cannot C. feet C. four C. pool C. basketball C. tall C. doctors C. strong D. eat D. work D. will not D. heads D. five D. garden D. football D. slim D. players D. old 查看答案
题型：选择题 基于“学生—课程”数据库中的三个基本表：学生信息表s(sno，sname，sex，age，dept)，主码为snO课程信息表c(cno，cname，teacher)，主码为cno学生选课信息表sc(sno，cno，grade)，主码为(sno，cno) 实现“从学生信息表中找出性别为女的学生姓名”的SQL语句是( )。A．SELECT* FROM sB．SELECT* FROM s WHERE sex：='女'C．SELECT sname．FROM s WHERE sex='女'D．SELECT*FROM s WHERE grade=\ 查看答案
题型：选择题 下列说法中正确的是A．更年期妇女适宜采用易受孕期知晓法避孕B．药物流产完全后可立即服用短效口服避孕药进行避孕C．滋养细胞疾病清宫术后可放置IUD避孕D．年龄在30岁以上的吸烟妇女不宜选用复方短效口服避孕药E．有痤疮的妇女不宣选用左炔诺孕酮宫内节育器(曼月乐)避孕 查看答案