下列序列中哪个可能是Ⅱ类限制酶的识别序列() A.ATATCG B.CCCTGG C 发布时间:2017-06-01 06:05 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列序列中哪个可能是Ⅱ类限制酶的识别序列()A.ATATCGB.CCCTGGC.GATATCD.AGCCGAE.GAGTC
题型:单项选择题 Do you always understand the instructions on a bottle of medicine? Here’s one for John. John is twelve years old. He had a bad cold and coughed(咳嗽) day and night. He went to see a doctor and was given some cough medicine. Please read the following instructions and if you can understand them.Cough Medicine:The medicine is for a person with a cough. Shake it well before use.Take it three times each day before meals or before sleep.Dose (药量):Age: over 14 2 teaspoonfuls8~13 1 teaspoonful4~7 1/2 teaspoonfulDot fit for children below the age of three or old persons with heart trouble. Put it in a cold place. Use it before December 1st, 2004.小题1:John should take ____________ a day.A.2 teaspoonfulsB.3 teaspoonfulsC.4 teaspoonfulsD.1 teaspoonful小题2:John should ___________ before he takes it.A.shake the medicine wellB.eat nothingC.do some exercisesD.drink a cup of tea小题3:When people are ____________ years old, they cannot take this medicine.A.eightyB.thirtyC.twoD.twelve 查看答案
题型:单项选择题 面对日本核泻漏,引发的食盐抢购潮,国家及时采取措施,平息“盐荒”。这体现的政治学道理有 [ ]A.我们党坚持执政为民 B.我们国家机关坚持对人民负责的原则 C.国家积极履行政治职能,维护社会稳定 D.我们党在重大问题上坚持科学决策、民主决策 查看答案
题型:单项选择题 国家投资39亿元在南方某海港建国家石油战略储备库,计划建42台100000m³/台浮顶式储罐。由A公司承担该项目的施工任务。土建环梁完成后,需要按设计文件的要求在环梁内分层填河砂并压实到95%的密实度。由于河砂需求量过大,施工单位申请用山砂替代河砂,获业主同意。按经监理批准的施工方案,采用正装法施工。在进行第4圈罐壁板组焊时,已是南方的雨季,为此,施工单位加大了质量专检力度,统计焊接质量问题如下表:经过12个月的奋战,终于按期实现了机械竣工。分析罐安装需要哪些特殊工种的操作工? 查看答案