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Oscar saw an umbrella inside—— a very old one with a beautifully carved handle. ____23___He had not seen it in more than 20 years , he recognized it ____24____. Oscar was 16 when he first saw the

ime. worth to watch worthy watching worth being watch worth watching words that we should pay attention to ______ on the blackboard. written written writing books ______ given ______ him as gifts.

8.（ 2020 包头）国家体育场 “鸟巢 ”建筑面积达 万平方米，将 万平方米用科学记数法（四舍五入保留 2 个有效数字）表示约为（） A. 平方米 B. 平方米 C. 平方米 D. 平方米 9.(2020 青岛改编 )由四舍五入法得到的近似数 103，下列说法中正确的是（） ，有 2 个有效数字 ，有 3 个有效数字 ，有 3 个有效数字 ，有 4 个有效数字 第 3 页 共 5 页 10

promised to pick me up at the school gate. However, he ______ yet. 39。 t arrive 39。 t arrive 39。 t arriving 39。 t arrived 8.—Jim isn’t in the classroom. Where is he? —He _______to the teacher’s

12.— Do you still have a headache, Billy? — No, it s ______. I m all right now, mum. 13.— What are on show in the museum? — Some photos ______ by African children. taken taken 第 3 页 共 5 页 been taken

m the passage that ___________. A. China can make and sell any product all over the world B. high pay may not solve the problem of China‟s research environment C. cooperation with institutions has

B． Over C． Before D． Half 4． B． insists C． exhibits D． reveals 5． B． expose C． contain D． construct 6． B． because C． since D． for 7． B． studying C． starting D． calling 大家网高考论坛 大家网，全球第一学习门户。 8． A．

First, employers should take the responsibility for their retired employees. To make this possible, a percentage of profits should be set aside for this purpose. But when a pany must take lifelong

． 6 D． 9 [答案 ] C [解析 ] ∵ f(x＋ y)＝ f(x)＋ f(y)＋ 2xy，对任意 x、 y∈ R 成立， ∴ x＝ y＝ 0 时，有 f(0)＝ f(0)＋ f(0)， ∴ f(0)＝ 0，又 f(1)＝ 2， ∴ y＝ 1 时，有 f(x＋ 1)－ f(x)＝ f(1)＋ 2x＝ 2x＋ 2， ∴ f(0)－ f(－ 1)＝ 0， f(－ 1)－ f(－ 2)＝－ 2

24m B． 25m C． 28m D． 30m 2. （ 2020年孝感） 美是一种感觉，当人体下半身长与身高的比值越接近 ，越给人一种美感．如图，某女士身高 165cm，下半身长 x与身高 l的比值是 ，为尽可能达到好的效果，她应穿的高跟鞋的高度大约为（ ） A． 4cm B． 6cm C． 8cm D． 10cm ． 3.（ 2020 黑龙江省齐齐哈尔 市） 如图，边长为 1的菱形