设X=25×(29/32),Y=23×(5/8),阶码为3位,尾数为5位(均不包含符号数),用变形补码计算X+Y,要求按照计
设X=25×(29/32),Y=23×(5/8),阶码为3位,尾数为5位(均不包含符号数),用变形补码计算X+Y,要求按照计算机中浮点数的运算方法写出详细运算步骤。
设X=25×(29/32),Y=23×(5/8),阶码为3位,尾数为5位(均不包含符号数),用变形补码计算X+Y,要求按照计算机中浮点数的运算方法写出详细运算步骤。
第1题
下面是一组32个人的收缩压SBP(y,单位:mmHg)与其肥胖指标Quet(x)的数据,其中Quet=100×体重/身高2.画出散点图及回归分析
序号 Quet(x) SBP(y) | 序号 Quet(x) SBP(y) |
1 2.876 135 2 3.251 122 3 3.1 130 4 3.768 148 5 2.979 146 6 2.79 129 7 3.668 162 8 3.612 160 9 2.368 144 10 4.637 180 11 3.877 166 12 4.032 138 13 4.116 152 14 3.673 138 15 3.562 140 16 2.998 134 | 17 3.36 145 18 3.024 142 19 3.171 135 20 3.401 142 21 3.628 150 22 3.751 144 23 3.296 137 24 3.21 132 25 3.301 149 26 3.017 132 27 2.789 120 28 2.956 126 29 3.8 161 30 4.132 170 31 3.962 152 32 4.01 164 |
第2题
A(low) 15% B(low) 不用催化剂
A(high) 25% B(low) 不用催化剂
A(low) 15% B(high) 用催化剂
A(high) 25% B(high) 用催化剂全部试验得出的观察值如表2.2.1所示.
表2.2.1
因子水 | 平组合 | 观察值(n=3)yik 1 2 3 | 和yi记号 |
A1 | B1 | 28 25 27 | 80 l |
Ah | B1 | 36 32 32 | 100 a |
A1 | Bh | 18 19 23 | 60 b |
Ah | Bh | 31 30 29 | 90 ab |
∑=330 |
试分析因子A,B和交互作用A×B对化学反应的影响
第3题
单位:人,元 | |||||||
样本群 | 职工人数 (Ni) | 职工总收入 (Nibar{x}_i) | 人均月收入 (bar{x}_i) | 样本群 | 职工人数 (Ni) | 职工总收入 (Nibar{x}_i) | 人均月收入 (bar{x}_i) |
1 | 520 | 170560 | 3280 | 5 | 850 | 1870000 | 2200 |
2 | 108 | 432000 | 4000 | 6 | 9000 | 3780000 | 4200 |
3 | 1200 | 4440000 | 3700 | 7 | 600 | 210000 | 3500 |
4 | 1400 | 4340000 | 3100 | 8 | 340 | 1084600 | 3190 |
9 | 3200 | 11968000 | 3740 | 22 | 600 | 2640000 | 4400 |
10 | 900 | 3204000 | 3560 | 23 | 480 | 1248000 | 2600 |
11 | 780 | 3588000 | 4600 | 24 | 680 | 1849600 | 2720 |
12 | 423 | 1226700 | 2900 | 25 | 1300 | 4030000 | 3100 |
13 | 362 | 1846200 | 5100 | 26 | 1100 | 2860000 | 2600 |
14 | 1250 | 4950000 | 3960 | 27 | 650 | 2210000 | 3400 |
15 | 1700 | 5610000 | 3300 | 28 | 760 | 3085600 | 4060 |
16 | 430 | 1763000 | 4100 | 29 | 480 | 1392000 | 2900 |
17 | 2400 | 8928000 | 3720 | 30 | 550 | 1925000 | 3500 |
18 | 8200 | 31488000 | 3840 | 31 | 420 | 1533000 | 3650 |
19 | 700 | 2940000 | 4200 | 32 | 980 | 3851400 | 3930 |
20 | 910 | 2912000 | 3200 | 33 | 880 | 4128000 | 4800 |
21 | 4200 | 15960000 | 3800 |
第4题
由下表中的玻璃对,设=0,P0=0.31和P0允许误差|△P0|<0.001,试求有哪些冕牌在前或火石在前的玻璃对满足上述要求。
表 40种玻璃的n、v值
|
第5题
哈尔滨市去年空调购进物流调查表 | |||
时间t | 购进车次Xt | 月季节指数a'i(%) | 月季节指数ai(%) |
[1] | [2] | [3] | [4] |
1月 | 5 | 11 | 11 |
2月 | 4 | 9 | 9 |
3月 | 10 | 23 | 23 |
4月 | 25 | 57 | 57 |
5月 | 45 | 102 | 102 |
6月 | 106 | 241 | 241 |
7月 | 94 | 214 | 214 |
8月 | 90 | 205 | 205 |
9月 | 60 | 136 | 136 |
10月 | 50 | 114 | 114 |
11月 | 29 | 66 | 66 |
12月 | 10 | 23 | 23 |
合计 | 528 | 1201 | |
月平均X | 44 | a'i=Xt/X×100% | 调整后 |
第6题
The biggest increase will occur at private colleges. Public colleges, heavily subsidized by tax funds, will also【25】their tuition, but the increase will be a few percentage points【26】than their privately sponsored neighbors.
【27】a follow-up, the United Press international did their own study【28】Massachus-setts Institute of Technology. At M. I. T. advisors recommended【29】students have $ 8,900【30】for one year's expenses, including $ 5,300【31】tuition, $ 2,685 for room and【32】, $ 630 for personal expenses, and $ 285 for books and supplies. Ten years ago the tuition【33】only $ 2,150. To【34】that another way, the cost has climbed 150 percent in the last【35】.
(41)
A.down
B.up
C.away
D.off
第7题
下表是某国1973~2004年社会商品零售总额(按当年价格计算),分析预测该国社会商品零售总额。
单位:亿元 | ||
年份 | 时序t | 总额yt |
1973 | 1 | 276.8 |
1974 | 2 | 348.0 |
1975 | 3 | 381.1 |
1976 | 4 | 392.2 |
1977 | 5 | 461.0 |
1978 | 6 | 474.2 |
1979 | 7 | 548.0 |
1980 | 8 | 638.0 |
1981 | 9 | 696.9 |
1982 | 10 | 607.7 |
1983 | 11 | 604.0 |
1984 | 12 | 604.5 |
1985 | 13 | 638.2 |
1986 | 14 | 670.3 |
1987 | 15 | 732.8 |
1988 | 16 | 770.5 |
1989 | 17 | 737.3 |
1990 | 18 | 801.5 |
1991 | 19 | 858.0 |
1992 | 20 | 929.2 |
1993 | 2l | 1023.3 |
1994 | 22 | 1106.7 |
1995 | 23 | 1163.6 |
1996 | 24 | 1271.1 |
1997 | 25 | 1339.4 |
1998 | 26 | 1432.8 |
1999 | 27 | 1558.6 |
2000 | 28 | 1800.0 |
2001 | 29 | 2140.0 |
2002 | 30 | 2350.0 |
2003 | 31 | 2570.0 |
2004 | 32 | 2849.4 |
第8题
Mary Anning (1799-1847) was a British fossil hunter who began finding【21】as a child, and soon supported herself and her very【22】family by finding and selling fossils. Very【23】is known about her life, but her father was a cabinet maker and he also【24】local fossils.
Mary【25】on the southern coast of England, in a town called Lyme Regis. Its famous【26】by the sea contain【27】fossil layers that【28】from the Triassic, Jurassic and Cretaceous periods (the【29】of the dinosaurs, other bizarre reptiles, large insects, sea creatures,【30】mammals, and【31】life forms).
Mary Anning【32】and prepared the first fossilized plesiosaur (an ocean-dwelling reptile) and the first Ichthyosaurus (an ocean-dwelling reptile that【33】like a dolphin). She found many other important fossils, including Pterodactylus (a flying reptile), sharks (and other fish), and so on.【34】with her brother Joseph, Mary supplied prepared fossil specimens to【35】museums, scientists, and private collections.
(41)
A.cliffs
B.dinosaurs
C.fossils
D.museums
第11题
某市一路公共汽车在一天内连续来回跑了40趟,每趟运载乘客人数资料如下:
21 19 24 33 23 22 26 29 31 13
28 24 21 10 28 18 19 27 28 30
23 27 32 23 20 26 28 21 24 17
23 14 27 22 35 17 24 21 28 18
要求:试用游程检验法判断这些是否为一个随机样本(α=0.05)。