胡敏酸A4/A6比值A4/A6ratioofhumicacid

[单选题]指出公式=MAX(A2，A4:A6，B3)表示()。A．比较A2、A4、A6、B3的大小B．求A2、A4、A6、B3中的最大值C．求A2、A4、A5、A6、B3中的最大值D．求A2、A4、A5、A6、B3的和

[单选题]在等差数列{an}中，a2=5，a4=7，则a6=()。A.9B.10C.11D.12

[判断题] 设计文件中A4～A6级起重机的金属结构应进行疲劳验算。A . 正确B . 错误

[单选题]桥式重机工作级别为A4~A6时，卷筒直径与钢丝绳直的关系为（）。A . D卷≥14d绳B . D卷≥（16～20）d绳C . D卷≥16d绳D . D卷≥25d绳

[单选题](A4)A．MORE THAN WILLPOWER.B．SUPPORT NETWORK.C．CHANGING YOUR ENVIRONMENT.D．START SLOW.E．FIRST THINGS FIRST. WE ALL KNOW THAT BREAKING A BAD HABIT OR ESTABLISHING A NEW, HEALTHY ONE CAN BE DIFFICULT, BUT PERSISTENCE PAYS OFF．RESEARCHERS AT THE UNIVERSI

[单选题](A4)A．MIND YOURSELF THAT DON"T BE A SLAVE TO EMAIL.B．YOU SHOULD PLAN YOUR DAY AT THE START OF EACH DAY.C．GETTING YOUR OFFICE ORGANIZED WILL IMPROVE YOUR WORKING EFFICIENCY.D．TAKING ADVANTAGE OF SOME RIGHT SOFTWARE COULD HELP YOU A LOT.E．YOU CAN DELE

[单选题](A4)A．CREATE A CREATIVE SPACE．B．KEEP AN OPEN MIND．C．ANYTHING IS POSSIBLE．D．DON"T NEGLECT THE DETAIL.E．TIE INTO YOUR BUSINESS GOALS. CREATING A CREATIVE WORKFORCE PLACING AN EMPHASIS ON CREATIVITY WITHIN THE WORKFORCE IS ONE OF THE SMARTEST THINGS TH

[单选题](A4)A．SEARCH, DON"T FILE．B．MAKE AN APPOINTMENT RIGHT AFTER WORK.C．FIGURE OUT YOUR CORE WORK ACTIVITIES.D．AVOID INSTANT MESSAGING AND TURN OFF PHONES.E．SAY NO. WHAT WOULD YOU DO IF YOU HAD AN EXTRA HOUR A DAY? THIS IS A COMMON BARRIER I RUN INTO WHEN

[单选题] 在Excel中，若A1、A2、A3、A4、A5、A6单元格的值分别为2、4、6、8、10、12，在 B1 单元格中输入函数“=ABS[MIN（A1：A6）-MAX（A1：A6）]”，则 B1 单元格的值为 （49） 。（49）A．-10B．10C．12D．0

[单选题] 在Excel中，若A1、A2、A3、A4、A5、A6单元格的值分别为2、4、6、8、10、12，在 B1 单元格中输入函数“=ABS[MIN（A1：A6）-MAX（A1：A6）]”，则 B1 单元格的值为 （49） 。（49）A．-10B．10C．12D．0