人工培养病原微生物的最适宜温度是37℃,但应除外?() ["大肠埃希菌","结核分枝杆菌","浅部真菌","痢疾志贺菌","霍乱弧菌"]
模拟酶
设SC表中记录成绩的列为:Grade,类型为int。若在查询成绩时,希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示,正确的Case函数是()。 [" Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ End"," Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ End"," Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ End","Case Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End"]
在含羰基的分子中,增加羰基的极性会使分子中该键的红外吸收带() ["向高波数方向移动","向低波数方向移动","不移动","稍有振动"]
简述明代服饰的特点。
什么是随机存取方式?哪些存储器采用随机存取方式?