1.选择题- (共6题)
1.电视台与某广告公司签约播放两部影片集,其中影片集甲每集播放时间为19分钟(不含广告时间,下同),广告时间为1分钟,收视观众为60万;影片集乙每集播放时间为7分钟,广告时间为1分钟,收视观众为20万,广告公司规定每周至少有7分钟广告,而电视台每周只能为该公司提供不多于80分钟的节目时间(含广告时间).
(Ⅰ)问电视台每周应播放两部影片集各多少集,才能使收视观众最多;
(Ⅱ)在获得最多收视观众的情况下,影片集甲、乙每集可分别给广告公司带来a和b(万元)的效益,若广告公司本周共获得3万元的效益,记S= {#mathml#}{#/mathml#} + {#mathml#}{#/mathml#} 为效益调和指数(单位:万元),求效益调和指数的最小值.
4.某工厂2016年计划生产A、B两种不同产品,产品总数不超过300件,生产产品的总费用不超过9万元.A、B两个产品的生产成本分别为每件500元和每件200元,假定该工厂生产的A、B两种产品都能销售出去,A、B两种产品每件能给公司带来的收益分别为0.3万元和0.2万元.问该工厂如何分配A、B两种产品的生产数量,才能使工厂的收益最大?最大收益是多少万元?
2.单项选择- (共11题)
7.
If I had followed her advice and worn _______ warm clothing, I wouldn’t have caught such _______ bad cold.
A.a; / | B.a; a | C./; a | D./; / |
8.
--I once got lost during my first visit to Beijing.
-- Oh, did you? You ____ me as your guide.
-- Oh, did you? You ____ me as your guide.
A.might have asked | B.could ask | C.would have asked | D.would ask |
9.
This passage had many new words and the students could not _______ what the writer meant.
A.make out | B.make up | C.stand out | D.stand for |
10.
You were driving carelessly and your speed was above the limit. You’re the one _______.
A.blamed | B.to be blamed for | C.to blame | D.blaming |
11.
The two naughty boys were quiet when eating, and they were accustomed to ______ at meals.
A.talk | B.talking | C.not to talk | D.not talking |
12.
In the recent coal mine accident, more than one hundred miners were left ______underground.
A.to be trapped | B.trapped | C.having trapped | D.trapping |
13.
________ is known to us all is that Antarctica is the coldest place on Earth.
A.It | B.As | C.What | D.That |
14.
I have taken jogging for about an hour every morning as my daily routine _______the weather.
A.whatever | B.however | C.whichever | D.whenever |
15.
I notice Linda is often absent from school because of illness. _______ she is not so healthy as she used to be?
A.Why is it that | B.Is it why that | C.Why is | D.Is it why |
16.
How long do you think it will be _______ scientists succeed in providing a cure for cancer?
A.when | B.after | C.since | D.before |
试卷分析
-
【1】题量占比
选择题:(6道)
单项选择:(11道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:5
7星难题:0
8星难题:5
9星难题:1