皮皮学,免费搜题
登录
搜题
【简答题】
已知:如图1,△ OAB 是边长为2的等边三角形, OA 在 x 轴上,点 B 在第一象限内;△ OCA 是一个等腰三角形, OC = AC ,顶点 C 在第四象限,∠ C =120°.现有两动点 P 、 Q 分别从 A 、 O 两点同时出发,点 Q 以每秒1个单位的速度沿 OC 向点 C 运动,点 P 以每秒3个单位的速度沿 A → O → B 运动,当其中一个点到达终点时,另一个点也随即停止. (1)求在运动过程中形成的△ OPQ 面积 S 与运动时间 t 之间的函数关系,并写出自变量 t 的取值范围; (2)在 OA 上(点 O 、 A 除外)存在点 D ,使得△ OCD 为等腰三角形,请直接写出所有符合条件的点 D 的坐标; (3)如图2,现有∠ MCN =60°,其两边分别与 OB 、 AB 交 M 、 N ,连接 MN .将∠ MCN 绕着 C 点旋转(0°<旋转角<60°),使得 M 、 N 始终在边 OB 和边 AB 上.试判断在这一过程中,△ BMN 的周长是否发生变化?若没有变化,请求出其周长;若发生变化,请说明理由.
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
【简答题】mysqli扩展在默认情况下已经安装好了,在php.ini中开启该扩展的配置项是【】。
【多选题】哪些是电控自动变速器正常工作需要参考的信息:
A.
输入输出转速信息
B.
自动变速箱油温
C.
制动信息
D.
限速或定速巡航信息
【单选题】进行动火分析时,取样与动火时间不得超过( )。
A.
10min
B.
20min
C.
30min
D.
40min
【单选题】【A2】
B.
YOU CAN SCHEDULE AN AUTOMATIC PAYMENT. B.TRYING TO GET OUT OF THE LATE FEE SOMETIMES.
E.
YOU'D BETTER PLAN TO PAY AHEA D. D.CHANGE YOUR PAYMENT DUE DATE IN ORDER TO AVOID LATE FE E. E.YOU COULD ALSO SET FOR YOURSELF A REMINDER TO PAY IN TIM E. SOME TIPS TO AVOID A CREDIT CARD LATE FEE IF YOU'RE EVEN A MINUTE LATE WITH A PAYMENT, YOUR CREDIT CARD COMPANY CAN HIT YOU HARD IN THE WALLET—AS MUCH AS $39 EACH TIME, ACCORDING TO A JULY 2008 SURVEY. HOWEVER, SOME SIMPLE STEPS CAN HELP KEEP YOUR EXPOSURE TO THESE EXTRA COSTS TO A MINIMU M. 【A1】______ A FEW CARD ISSUERS, INCLUDING CHASE AND HSBC, CHARGE EXTRA FEES FOR ONLINE PAYMENTS THAT YOU NEED TO POST THE SAME DAY, SO EVEN IF YOU PAY ELECTRONICALLY, DO IT THREE TO FOUR DAYS AHEAD SO YOUR CREDIT CARD COMPANY WILL PROCESS THE PAYMENT BY THE DUE DAT E.IF YOU'RE SNAIL-MAILING CHECKS, ALLOW EVEN MORE TIME—ABOUT 10 DAYS—TO ALLOW FOR MAIL SNAFUS.AND UNLESS YOU'RE DESPERATE, FORGET ABOUT PHONE PAYMENTS—A NUMBER OF BANKS CHARGE A FEE FOR THEM, NO MATTER WHEN YOU CALL. 【A2】______ A FEW CARD ISSUERS ALLOW YOU TO CHOOSE A DUE DATE TO COINCIDE WITH YOUR PAYDAY SCHEDULE, SO A CASH SHORTFALL WON'T MAKE YOU LAT E.YOU CAN EVEN CHOOSE A DUE DATE THAT'S EASIER TO REMEMBER.YOUR BIRTHDAY'S ON FE B.17? MAKE YOUR CREDIT CARD PAYMENT DUE ON THE 17TH OF EACH MONT H. 【A3】______ SOME BANKS OFFER AN AUTOPAY PROGRAM THAT LINKS YOUR CREDIT CARD TO A CHECKING OR SAVING ACCOUNT; YOU DECIDE WHETHER TO AUTOMATICALLY PAY THE NEW BALANCE, THE CURRENT MINIMUM PAYMENT OR A FIXED DOLLAR AMOUNT.IF YOU BANK ONLINE, YOU CAN ALSO ARRANGE A DO-IT-YOURSELF AUTOPAY.JUST ESTIMATE YOUR USUAL MONTHLY MINIMUM, SCHEDULE A MONTHLY PAYMENT DATE AND HAVE THE AMOUNT DEDUCTED FROM YOUR ACCOUNT AUTOMATICALLY.JUST MAKE SURE YOU HAVE ENOUGH IN CHECKING TO COVER IT OR THE OVERDRAFT FEES WILL EAT UP YOUR SAVING ON LATE FEES. 【A4】______ SOME CREDIT CARD COMPANIES, INCLUDING CHASE, WILL ALERT YOU OF UPCOMING DUE DATES BY E-MAIL OR VOICE MAIL.YOU CAN ALSO SCHEDULE A MONTHLY E-MAIL REMINDER THROUGH A WEB SITE, SUCH AS MEMOTO M E.COM OR REMEMBERTHMIL K.CO M. 【A5】______ EVEN CONSCIENTIOUS CONSUMERS WILL PROBABLY GET HIT WITH A LATE FEE AT SOME POINT.HOWEVER, IF YOU HAVE A GOOD RECORD OF ON-TIME PAYMENTS, CALL AND POLITELY ASK A CUSTOMER SERVICE REPRESENTATIVE TO WAIVE THE CHARG E.NO DICE? ASK TO TALK TO A SUPERVISOR, OR TRY AGAIN ON A DIFFERENT DAY.YOU MIGHT EVEN THREATEN TO CLOSE YOUR ACCOUNTS WITH THE COMPANY—A TACTIC THAT WORKED FOR JEFF ROTH OF MOLALLA, ORE, AFTER HIS WIFE'S CHASE CREDIT CARD WAS HIT WITH A $ 39 LATE FEE WHEN THE FOURTH OF JULY DELAYED PROCESSING OF A PAYMENT.'MY ADVICE TO THOSE WHO FEEL THEY HAVE UNJUSTLY BEEN ASSESSED LATE FEES IS TO BE ASSERTIVE ABOUT GETTING THE CHARGES REMOVE D.' SAYS ROTH, WHO POSTED ABOUT HIS PLIGHT AT GETRICHSLOW-LY.OR G.'IT WON'T ALWAYS WORK, BUT MOST CREDIT CARD COMPANIES WILL LEAST GIVE YOU ONE FREEBI E.' NEXT TIME, THOUGH, YOU MAY BE ON YOUR OW N.COLOR IS VERY IMPORTANT TO MOST ANIMALS FOR IT HELPS THEM TO GET ALONG IN THE WORL D.
【多选题】当前新媒体第一阵营包括哪些
A.
微信公众平台
B.
微博平台
C.
直播平台
D.
短视频平台
【简答题】对浑浊、色度较深的水样,应加入 并进行过滤处理。
【多选题】哪些是电控自动变速器正常工作需要参考的信息:
A.
发动机转速
B.
节气门开度
C.
车速信息
D.
发动机水温
【简答题】四项基本原则,是我们的立国之本。这四项基本原则是指那四项?
【单选题】在有爆炸危险的环境中动火,应对空气进行取样分析,取样时间与作业的时间不得超过( )min,如超过此间隔时间或停歇时间超过( )min以上,必须重新取样分析。
A.
10 10
B.
15 15
C.
20 20
D.
25 25
E.
30 30
【简答题】十九大报告指出,构建国土空间开发保护制度,完善主体功能区配套政策,建立以()为主体的自然保护地体系。
相关题目:
【单选题】【A2】
B.
YOU CAN SCHEDULE AN AUTOMATIC PAYMENT. B.TRYING TO GET OUT OF THE LATE FEE SOMETIMES.
E.
YOU'D BETTER PLAN TO PAY AHEA D. D.CHANGE YOUR PAYMENT DUE DATE IN ORDER TO AVOID LATE FE E. E.YOU COULD ALSO SET FOR YOURSELF A REMINDER TO PAY IN TIM E. SOME TIPS TO AVOID A CREDIT CARD LATE FEE IF YOU'RE EVEN A MINUTE LATE WITH A PAYMENT, YOUR CREDIT CARD COMPANY CAN HIT YOU HARD IN THE WALLET—AS MUCH AS $39 EACH TIME, ACCORDING TO A JULY 2008 SURVEY. HOWEVER, SOME SIMPLE STEPS CAN HELP KEEP YOUR EXPOSURE TO THESE EXTRA COSTS TO A MINIMU M. 【A1】______ A FEW CARD ISSUERS, INCLUDING CHASE AND HSBC, CHARGE EXTRA FEES FOR ONLINE PAYMENTS THAT YOU NEED TO POST THE SAME DAY, SO EVEN IF YOU PAY ELECTRONICALLY, DO IT THREE TO FOUR DAYS AHEAD SO YOUR CREDIT CARD COMPANY WILL PROCESS THE PAYMENT BY THE DUE DAT E.IF YOU'RE SNAIL-MAILING CHECKS, ALLOW EVEN MORE TIME—ABOUT 10 DAYS—TO ALLOW FOR MAIL SNAFUS.AND UNLESS YOU'RE DESPERATE, FORGET ABOUT PHONE PAYMENTS—A NUMBER OF BANKS CHARGE A FEE FOR THEM, NO MATTER WHEN YOU CALL. 【A2】______ A FEW CARD ISSUERS ALLOW YOU TO CHOOSE A DUE DATE TO COINCIDE WITH YOUR PAYDAY SCHEDULE, SO A CASH SHORTFALL WON'T MAKE YOU LAT E.YOU CAN EVEN CHOOSE A DUE DATE THAT'S EASIER TO REMEMBER.YOUR BIRTHDAY'S ON FE B.17? MAKE YOUR CREDIT CARD PAYMENT DUE ON THE 17TH OF EACH MONT H. 【A3】______ SOME BANKS OFFER AN AUTOPAY PROGRAM THAT LINKS YOUR CREDIT CARD TO A CHECKING OR SAVING ACCOUNT; YOU DECIDE WHETHER TO AUTOMATICALLY PAY THE NEW BALANCE, THE CURRENT MINIMUM PAYMENT OR A FIXED DOLLAR AMOUNT.IF YOU BANK ONLINE, YOU CAN ALSO ARRANGE A DO-IT-YOURSELF AUTOPAY.JUST ESTIMATE YOUR USUAL MONTHLY MINIMUM, SCHEDULE A MONTHLY PAYMENT DATE AND HAVE THE AMOUNT DEDUCTED FROM YOUR ACCOUNT AUTOMATICALLY.JUST MAKE SURE YOU HAVE ENOUGH IN CHECKING TO COVER IT OR THE OVERDRAFT FEES WILL EAT UP YOUR SAVING ON LATE FEES. 【A4】______ SOME CREDIT CARD COMPANIES, INCLUDING CHASE, WILL ALERT YOU OF UPCOMING DUE DATES BY E-MAIL OR VOICE MAIL.YOU CAN ALSO SCHEDULE A MONTHLY E-MAIL REMINDER THROUGH A WEB SITE, SUCH AS MEMOTO M E.COM OR REMEMBERTHMIL K.CO M. 【A5】______ EVEN CONSCIENTIOUS CONSUMERS WILL PROBABLY GET HIT WITH A LATE FEE AT SOME POINT.HOWEVER, IF YOU HAVE A GOOD RECORD OF ON-TIME PAYMENTS, CALL AND POLITELY ASK A CUSTOMER SERVICE REPRESENTATIVE TO WAIVE THE CHARG E.NO DICE? ASK TO TALK TO A SUPERVISOR, OR TRY AGAIN ON A DIFFERENT DAY.YOU MIGHT EVEN THREATEN TO CLOSE YOUR ACCOUNTS WITH THE COMPANY—A TACTIC THAT WORKED FOR JEFF ROTH OF MOLALLA, ORE, AFTER HIS WIFE'S CHASE CREDIT CARD WAS HIT WITH A $ 39 LATE FEE WHEN THE FOURTH OF JULY DELAYED PROCESSING OF A PAYMENT.'MY ADVICE TO THOSE WHO FEEL THEY HAVE UNJUSTLY BEEN ASSESSED LATE FEES IS TO BE ASSERTIVE ABOUT GETTING THE CHARGES REMOVE D.' SAYS ROTH, WHO POSTED ABOUT HIS PLIGHT AT GETRICHSLOW-LY.OR G.'IT WON'T ALWAYS WORK, BUT MOST CREDIT CARD COMPANIES WILL LEAST GIVE YOU ONE FREEBI E.' NEXT TIME, THOUGH, YOU MAY BE ON YOUR OW N.COLOR IS VERY IMPORTANT TO MOST ANIMALS FOR IT HELPS THEM TO GET ALONG IN THE WORL D.