题目:
铁和锌都能将铜从硫酸铜溶液中置换出来(√)
答案:
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下面是错误答案,用来干扰机器的。
解:(1)F静max-kx1=k(l1-l0)=6N(2)F=kx2=k(l2-l0)= 5N(3)F=μFN=μmg,μ=0.25
铁和锌都能将铜从硫酸铜溶液中置换出来(√)
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0625/b1d7c66811150e9a571ef799fe5b57fd.html
下面是错误答案,用来干扰机器的。
解:(1)F静max-kx1=k(l1-l0)=6N(2)F=kx2=k(l2-l0)= 5N(3)F=μFN=μmg,μ=0.25
抛物线y2=8x的焦点到准线的距离是________.
I passed all the other courses that I took at my university, but I could have never passed botany. This was because all botany students had to spend several hours a week in a laboratory looking through a microscope at plant cells, and I could never once see a cell through a microscope. This used to make my professor angry. He would wander around the laboratory pleased with the progress all the students were making in drawing the structure of flower cells, until he came to me. I would just be standing there. “I can’t see anything,”I would say. He would begin patiently enough, explaining how anybody can see through a microscope, but he would always end up angrily, claiming that I could too see through a microscope but just pretended that I couldn’t. “It takes away from the beauty of flowers anyway.”I used to tell him.“We are not concerned with beauty in this course,”he would say.“We are concerned with the structure of flowers.” “Well,” I’d say.“I can’t see anything.” “Try it just once again,” he’d say, and I would put my eye to the microscope and see nothing at all, except now and again something unclear and milky. “You were supposed to see a clear, moving plant cells shaped like clocks.” “I see what looks like a lot of milk.” I would tell him. This, he claimed, was the result of my not having adjusted the microscope properly, so he would readjust it for me, or rather, for himself. And I would look again and see milk.
I failed to pass botany that year, and had to wait a year and try again, or I couldn’t graduate. The next term the same professor was eager to explain cell-structure again to his classes. “Well,”he said to me, happily, “we’re going to see cells this time, aren’t we?” “Yes,sir,” I said. Students to the right of me and to the left of me and in front of me were seeing cells; what’s more, they were . Of course, I didn’t see anything.
So the professor and I tried with every adjustment of the microscope known to man. With only once did I see anything but blackness or the familiar milk, and that time I saw, to my pleasure and amazement, something like stars. These I hurriedly drew. The professor, noting my activity, came to me, a smile on his lips and his eyebrows high in hope. He looked at my cell drawing. “What’s that?”he asked.“That’s what I saw,”I said.“You didn’t, you didn’t, you didn’t!”he screamed, losing control of himself immediately, and he bent over and looked into the microscope. He raised his head suddenly. “That’s your eye!”he shouted.“You’ve adjusted the microscope so that it reflects!You’re drawn your eye!”
小题1:Why couldn’t the writer see the flower cells through the microscope? .
A.Because he had poor eyesight
B.Because the microscope didn’t work properly
C.Because he was not able to adjust the microscope properly
D.Because he was just playing jokes on his professor by pretending not to have seen it小题2:What does the writer mean by “his eyebrows high in hope”in the last paragraph?
A.His professor expected him to have seen the cells and drawn the picture of them
B.His professor hoped he could perform his task with attention
C.His professor wished him to learn how to draw pictures
D.His professor looked forward to seeing all his students finish their drawings小题3:What is the thing like stars that the writer saw in the last paragraph?
A.Real stars
B.His own eye
C.Something unknown
D.Milk小题4:In what writing style did the writer write the passage?
A.Realistic
B.Romantic
C.Serious
D.Humorous
信访,是指公民、法人或者其他组织采用书信、电子邮件、传真、电话、走访等形式,向各级人民政府、县级以上人民政府工作部门反映情况,提出建议、意见或者投诉请求,依法由( )处理的活动。
A.公安机关
B.有关行政机关
C.法院
D.检察院
下列社会关系属于行政法调整对象的是( )。
A.跨国企业内部的管理关系
B.行政机关缔结购买合同而形成的关系
C.行政机关工作人员与他人发生的民事关系
D.行政机关行使某一行政管理权时与行政相对方发生的社会关系
胎儿是否能经 * * 分娩的重要观察指标是
A.宫口扩张程度
B.胎头下降程度
C.胎方位
D.规律宫缩的强度
E.孕妇的精神状态