摘要:第一节 单词拼写: 61.If you (除)30 by 5, the answer is 6. 62. To their hey still help the old man who lives alone. 63. He his speech with some amusing remarks. 64.The Christian Church his theory. 65. His speech made a good on the audience. 66. He has been soundly at chess. 67. Each worker one dollar to the Red Cross last week. 68. He didn’t the meeting yesterday. 69. To our , he passed the entrance examination. 70. Who was the owner of the car?. 第二节.单句改错: 71.Who put forward to a theory about the black holes? 72. Such many people died in the Asia tsunamithat happened at the end of the year 2004. 73. To their surprises, Tom got first prize in the English contest. 74. Although she didn’t mention any names, everyone knew who she was referring into. 75. They hoped to see the problems settled peaceful. 76. Although the wind blew hard, but they went on climbing Mount Tai. 77. Mary blamed her failure to the bad weather. 78. The wind increased so much that I had to put my tent up when it became too strong to do so. 79. David has no room to live. 80. I shall never forget the day in which I met Mr Wang for the first time. 第三节 书面表达 你班最近就“中学生课余时间上网的利弊 召开一次主题班会.同学们各抒已见.畅所欲言.作为班长.请你根据下列信息.作总结性发言. 注意:1. 发言的开头和结尾已给出.2. 词数:100左右. Attention, please! I’m going to give you a summary of today’s discussion about whether we should go online in our spare time.
网址:http://m.1010jiajiao.com/timu_id_2608794[举报]
甲和乙参加智力答题活动,活动规则:①答题过程中,若答对则继续答题;若答错则停止答题;②每人最多答3个题;③答对第一题得10分,第二题得20分,第三题得30分,答错得0分.已知甲答对每个题的概率为
,乙答对每个题的概率为
.
(Ⅰ)求甲恰好得30分的概率;
(Ⅱ)设乙的得分为ξ,求ξ的分布列和数学期望;
(Ⅲ)求甲恰好比乙多30分的概率. 查看习题详情和答案>>
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(Ⅰ)求甲恰好得30分的概率;
(Ⅱ)设乙的得分为ξ,求ξ的分布列和数学期望;
(Ⅲ)求甲恰好比乙多30分的概率. 查看习题详情和答案>>
观察此表:
1,
2,3,
4,5,6,7,
8,9,10,11,12,13,14,15,
…问:
(1)此表第n行的第一个数与最后一个数分别是多少?
(2)此表第n行的各个数之和是多少?
(3)2012是第几行的第几个数?
查看习题详情和答案>>
1,
2,3,
4,5,6,7,
8,9,10,11,12,13,14,15,
…问:
(1)此表第n行的第一个数与最后一个数分别是多少?
(2)此表第n行的各个数之和是多少?
(3)2012是第几行的第几个数?
对第n个时刻进入园区的人数f(n)和时间n(n∈N*)满足以下关系(如图1):f(n)=
|
对第n个时刻离开园区的人数g(n)和时间n(n∈N*)满足以下关系(如图2):g(n)=
|
(1)试计算在当天下午3点整(即15点整)时,世博园区内共有多少游客?
(2)请求出当天世博园区内游客总人数最多的时刻. 查看习题详情和答案>>