设计小时交通量是确定车道数和车道宽度或评价服务水平时的依据。
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Peter 是一个来自澳大利亚的男孩，刚来到中国，要写一篇介绍自己的文章交朋友，请根据表格提示，帮助他完成一篇60词左右的短文（可适度发挥）。
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在“把电流表改装成电压表”的实验中：
（1）改装前需要测量电流表G的内阻Rg，测量电路如图所示。图中R1是电位器（功能同滑动变阻器），R2是电阻箱，实验时，只闭合开关S1，调整R1的阻值，使电流表指针偏转到满刻度Ig；再闭合开关S2，只调整R2的阻值，使电流表指针偏转到满刻度的一半Ig/2，读出电阻箱R2的电值，即为电流表G的内阻____________Rg（选填“大于”“小于”或“等于”）；
（2）由电流表G的刻度盘可知此电流表的满偏电流以Ig=300
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| It was her giggling (咯咯笑) that drewmy attention. Note taking really wasn't all that funny. Walking over to the offender (肇事者), I asked for the 1 . Frozen, she refused to give it to me. I waited, all attention in the classroom on the quiet 2 between a teacher and a student. When she finally 3 it over she whispered, "Okay, but I didn't draw it." It was a hand-drawn 4 of me, teeth blackened and the words "I'm stupid" coming out of my mouth. I managed to fold it up calmly. My mind, 5 , was working angrily as I struggled not to 6 . I figured I knew the two most likely students who drew the picture. It would do them some 7 to teach them a lesson, and maybe it was high time that I did it. Thankfully, I was able to keep myself 8 . When there were about six minutes remaining, I showed the class the picture. They were all silent as I told them how 9 this was for me. I told them there must be a reason 10 and now was their chance to write down anything they needed to tell me. Then I let them write silently while I was seated in the back of the classroom, with tears in my eyes. As I 11 the notes later, many of them said something like, "I've got nothing 12 you." or "I'm sorry you were hurt." Some kids said, "We're afraid of you." But two notes, from the girls who I 13 drew the picture, had a list of issues. I was too 14 , too strict… Reading those notes, I realized that over the course of this year, instead of 15 my students, I had begun commanding them to 16 . Where I thought I was driving them to success I was 17 driving them away. I had some apology to make. But the next day in the classroom, one boy and one girl each handed me a card. The one 18 by all the boys expressed sincere regret for the ugly joke. The one from the girls asked for 19 . This was a lesson for both the kids and me. Forgiveness does not change the past, but it does enlarge the 20 . | ||||
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重度主动脉瓣狭窄的跨主动脉瓣平均压力阶差至少应大于（）
A.35mmHg
B.40mmHg
C.45mmHg
D.50mmHg
E.55mmHg
泵进口测温需观察控制柜上显示的温度，如温度（），则认为以达到预冷状态。
A.达到-162℃
B.低于-162℃
C.低于-100℃
D.低于0℃