毒物

把36分成9份，每份是4．______．

计算：（-1）²+[20-（-2）³]÷（-4）

如图6－2－8所示，一玻璃筒中注满清水，水中放一软木做成的小圆柱体R（圆柱体的直径略小于玻璃管的直径，轻重大小适宜，使它在水中能匀速上浮）．将玻璃管的开口端用胶塞塞紧（图甲）．现将玻璃管倒置（图乙），在软木塞上升的同时，将玻璃管水平向右加速移动，观察软木塞的运动，将会看到它斜向右上方运动，经过一段时间，玻璃管移至图丙中虚线所示位置，软木塞恰好运动到玻璃管的顶端，在图丁四个图中，能正确反映软木塞运动轨迹的是（   ）

乐手对于（）相当于车厢对于（）

A．钢琴；铁轨

B．乐队；火车

C．舞台；站台

D．乐谱；乘客

We already live in an ever-communicated world that will only become mere so in the next tech era. We’ve (1) that gets us so much information. We’ve got every second (2) , we’ve get computers and laptops, we’ve get personal organizers and we’re just being (3) and every advance in technology seems to create more and more communications at us. We are sort of (4) .
Research suggests that all the multi-tasking may actually make our brains (5) , producing a world-wide increase in IQ (6) and mere in recent decades. Is there any real benefit in (7) we new have to go through
We’re net becoming a race of (8) , but many de think certain skills are enhanced and certain are net. You knew the ability to (9) , to answer a dozen e- mails in five minutes, or to fill out (10) . That’s enhanced. But when someone is out there with his kids (11) or something like that, he’s got his cell phone in his pocket. He’s always wondering, "Gee, did I get a voicemail " This might have negative effects (12) .
Creativity is something that happens slowly. It happens when your brain is just (13) , just playing, when it (14) which you hadn’t thought of, or maybe you have time to read a book. You are a businessperson but you have time to (15) ,or about a philosopher and something that happened long age or something or some idea (16) . Actually, it might occur to you that you (17) in that way, and so it’s this mixture of unrelated ideas that feeds your productivity, (18) . And if your mind is disciplined to answer every e-mail, then you don’t have time for that playful noodling. You don’t have time for (19) . So I think maybe we’re getting smarter in .some senses, but ever-communication is (20) and to our reflection.

We already live in an ever-communicated world that will only become mere so in the next tech era. We’ve (1) that gets us so much information. We’ve got every second (2) , we’ve get computers and laptops, we’ve get personal organizers and we’re just being (3) and every advance in technology seems to create more and more communications at us. We are sort of (4) .
Research suggests that all the multi-tasking may actually make our brains (5) , producing a world-wide increase in IQ (6) and mere in recent decades. Is there any real benefit in (7) we new have to go through
We’re net becoming a race of (8) , but many de think certain skills are enhanced and certain are net. You knew the ability to (9) , to answer a dozen e- mails in five minutes, or to fill out (10) . That’s enhanced. But when someone is out there with his kids (11) or something like that, he’s got his cell phone in his pocket. He’s always wondering, "Gee, did I get a voicemail " This might have negative effects (12) .
Creativity is something that happens slowly. It happens when your brain is just (13) , just playing, when it (14) which you hadn’t thought of, or maybe you have time to read a book. You are a businessperson but you have time to (15) ,or about a philosopher and something that happened long age or something or some idea (16) . Actually, it might occur to you that you (17) in that way, and so it’s this mixture of unrelated ideas that feeds your productivity, (18) . And if your mind is disciplined to answer every e-mail, then you don’t have time for that playful noodling. You don’t have time for (19) . So I think maybe we’re getting smarter in .some senses, but ever-communication is (20) and to our reflection.