计算下列各题[tex=6.143x2.643]WC8gemc5z9sspXo9jSXRLHz7JA2xRSF4ZnPlUDwFzVvcwf+9t+J6QX7RMRF5MEx/[/tex]是由 [tex=3.0x1.357]pNE1UQrloelY+ZVhnPHhbw==[/tex]到[tex=3.0x1.357]DGyDTY2ggn8GmHxGif7yHA==[/tex]的直线段.

在[tex=9.143x1.429]EupHI179vSezrC13RukUhkA01uym78d00X9bUjMx/gYcaCYzk56XZN5DC+Fk/PNE[/tex]溶液中含有[tex=8.357x1.214]vZxXiFBWXdFf4toiK6LKL5qjljEx3u+8gU5CT7iEpCY=[/tex], 通人[tex=1.857x1.214]RsICoPjfj9D9ZEKOzAujAQ==[/tex]至饱和 ,达到平衡时(1) [tex=1.5x1.143]dy0pjvZVTLjkvjNwUvXkYw==[/tex]浓度多大?(2) 留在溶液中的[tex=2.214x1.214]TVrBEGtNaBidHnutj2Wj8A==[/tex]浓度多大?已知[tex=10.5x1.5]lX7R8mjx3NJa6MWsFhKTdFc6LBNu37LrCcB78mSGtQR1VE+6Rgj59A3hhMnasET01M/IkoypSa/YgZr6Qdcs5A==[/tex],[tex=9.714x1.643]tz4i2vblxXKjVXDEWfebkC0njzz+3U8xsMBnllJxqgzO6VDDF3rZzzYz/q8bZkQt[/tex]

计算 [tex=10.5x2.786]YLH0/nAwHPDNiv/4J3auu7wbNTDYwByzcVbN0fahtoggWo+yPBbD18XbJk268J7g[/tex], 其中 [tex=0.714x1.0]Hl8mr56J4t0Ek5ZoqbFYYg==[/tex] 为由点 [tex=3.0x1.357]pNE1UQrloelY+ZVhnPHhbw==[/tex] 到 [tex=3.0x1.357]zTBq93z+8cgI9C3rAWjJhA==[/tex] 的椭圆弧 [tex=4.714x1.429]AQb5TBXi3jUgwxq40Ctw5e9GZNQaFRV4mGkk0Y9Jtyw=[/tex]

已知一抛物线通过[tex=1.357x1.0]TE//0+sVAuXB7bvyYGNvpg==[/tex]轴上的两点[tex=3.0x1.357]pNE1UQrloelY+ZVhnPHhbw==[/tex]和[tex=3.0x1.357]WPwMSSpyvnvcRqkv3K0wQA==[/tex] .(1) 求证：两坐标轴与该抛物线所围图形的面积等于[tex=1.357x1.0]TE//0+sVAuXB7bvyYGNvpg==[/tex]轴与该抛物线所围图形的面积;(2) 计算上述两个平面图形绕[tex=1.357x1.0]TE//0+sVAuXB7bvyYGNvpg==[/tex]轴旋转一周所生成的两个旋转体体积[img=213x175]179b43faac85539.png[/img]

计算曲线积分 [tex=13.714x2.786]Ig3S60s06i2sQW1VnJaUKfV0tFHh0pzZu06phTEuJ4LgDI1p2km8qYEe2OVqeb5JQraRCVc38J1oMkgh8if0iGlHTftaaMAS7Ns5HGjkIyQ=[/tex], 其中 [tex=0.714x1.0]YiLkHgl7MlxE+QjUplQUKA==[/tex] 是位于第一象限中的直线 [tex=3.143x1.214]elV8xh6VF/il8BKc8NfOCA==[/tex] 与位于第二象限中的圆弧 [tex=3.929x1.429]M0sn/fi/Rz9ean07Tx2wJQ==[/tex] 构成的曲线;方向从[tex=3.0x1.357]pNE1UQrloelY+ZVhnPHhbw==[/tex] 经过 [tex=3.0x1.357]DGyDTY2ggn8GmHxGif7yHA==[/tex], 再到 [tex=3.571x1.357]0XZ1oj5rZc6GLbK52m2hYQ==[/tex].

位于坐标原点的我舰向位于点[tex=3.0x1.357]pNE1UQrloelY+ZVhnPHhbw==[/tex]处的敌舰发射制导鱼雷，使鱼雷永远对准敌舰，已知敌舰以最大速度 [tex=0.857x1.0]wNKCIalimEsZVy6seQVLKg==[/tex]在直线[tex=1.857x1.0]fwov+ZzREJJP/GTCJbKvrw==[/tex]上行驶，设鱼雷的速度大小是[tex=1.357x1.214]mnf1O9pEL4lR3hadb3AfXg==[/tex]，求鱼雷的航迹曲线方程，又敌舰行驶多远时将被鱼雷击中？

for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是：__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是（）。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )