问题
单项选择题
易纵向撕裂，撕裂时有白色粉尘飞扬（）
A．香加皮
B．黄柏
C．厚朴
D．桑白皮
E．牡丹皮
答案
参考答案：D
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易纵向撕裂，撕裂时有白色粉尘飞扬（）
A．香加皮
B．黄柏
C．厚朴
D．桑白皮
E．牡丹皮
参考答案：D
在“探究小车速度随时间变化的规律”的实验中，（1）需要的器材有：电磁打点计时器、（长木板、）复写纸片、导线、低压交流电源，______，______．
（2）某同学拖动纸带运动，打点计时器在纸带上打出一系列点，电源的频率是50Hz，处理时每隔1个点取一个记数点，标上字母A、B、C、D、E、F，A点与0刻度对齐．如图所示，某同学用mm刻度尺进行测量，请帮忙读出B、C在刻度尺上的位置，填到下表中：
| 计数点 | B | C | D | E | F |
| 位置（cm） | 4.44 | 6.22 | 8.12 |
（3）若认为一段时间中间时刻的瞬时速度就是这段时间内的平均速度，则打点计时器打下C点时小车的速度VC=______m/s．
In this modern world, we rush around all day, doing things, talking, emailing, sending and reading messages. We are always on, always connected, always thinking, always talking. There is no ___1___ for stillness. And when we are ___2 ___to be still because we’re in line for something, or waiting at a doctor’s appointment, or on a bus or train, we often ___3 ___something to do. Some will play with mobile devices, others will read something. Being still isn’t something we’re ___4___. This comes at a ___ 5___: we lose that time for ___6__, for observing and listening. We lose peace. And ___7___ yet: sometimes too much action is worse than no action at all. You can run around crazily, but get ___ 8___done. Take a moment to think about ___9__ you spend your days. Are you constantly rushing around? Are you constantly reading and answering ___10 ___, checking on the news and the latest stream of information? Are you always ___11___through your schedule? Is this how you want to spend your ___12___? If so, peace be with you. If not, take a moment to be ___13___. Don’t think about what you have to do, or what you’ve done already. ___14___be in the moment. Then after a minute or two of doing that, consider your life, and how you’d ___15___ it to be. See your life with less movement, less doing, less rushing. See it with more stillness, more consideration, more ___16___. Then be that vision. It’s pretty simple: all you have to do is sit still for a little bit each day. ___17___you’ve gotten used to that, try doing less each day. Breathe when you feel yourself moving too___18___. Slow down. Be present. Find happiness now, in this moment, instead of ___19___ for it. ___20 ___ the stillness. It’s a treasure, and it’s available to us, always.
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