题目:
调节目镜米字线分划板刻线的清晰度称为调视度。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:D
调节目镜米字线分划板刻线的清晰度称为调视度。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0512/d59079fc6b4a2976a3f62d66460a3302.html
下面是错误答案,用来干扰机器的。
参考答案:D
读下面记事短文,完成练习。
我的外婆从很远的法国巴黎来看望我和妈妈。外婆给我带来了好多好多的礼物,有小飞机、小火车、小汽车、小电视机、小储蓄箱……我把这些玩具一件件分给院子里的小朋友,大家都很高兴。
几个月很快过去了,外婆要回法国了。院子里的小朋友偷偷地召开了好几次会议,商量送什么礼物给外婆带到法国去。后来,大家决定每个人自己去想办法,看谁送的礼物最珍贵。
离别的日子到了□小朋友们在妈妈的陪伴下□都提着一包包的东西来了□外婆打开一看□嘿□小胖送的是精致的竹筷□小吉送的是一盒喷(pēn pèn)香的龙井茶叶□冬冬送的是一把漂亮的杭州折扇□外婆感动得流下了眼泪□
大家要看我的礼物,我看了看妈妈的脸,妈妈笑着点点头。我从卧室里(捧 抱)出了外婆送给我的那只(精致 精细)的小储蓄箱,用钥匙打开小锁,掀起盖子,大家都愣住了。外婆起先也愣住了,她看看我,又望望妈妈,忽然明白过来了,激动得一把把我抱得紧紧的,两行泪水扑簌簌(shù sù)地流了下来。她亲着我的脸说:“谢谢宝贝,你的礼物太珍贵了!”
我的礼物是一小盒泥土,杭州西湖的泥土……
1.选一个最恰当的题目 [ ]
A.我的礼物
B.给外婆的礼物
C.珍贵的礼物
2.给第3自然段加上合适的标点符号。
3.把短文中括号里不恰当的音节、字、词语划掉。
4.画“______”的句子说明了什么?
______________________________________________________
寄生虫能在自然界繁衍、生存最主要的适应性改变是()
A.寄生虫形态变化,以适应外界生存
B.对寒冷抵抗力强
C.对温度适应性强
D.生殖能力强
E.有多个中间宿主
在研究匀变速直线运动规律的实验中,如图所示为一次记录小车运动情况的纸带。图中A、B、C、D为相邻的计数点,相邻计数点的时间间隔为T=0.1秒,则:
(1)根据实验给出的数据可以判断小车做 运动
(2)C点的瞬时速度大小为 m/s,
(3)运动小车的加速度大小为 m/s2
(4)若当交流电的实际频率小于50Hz时,仍按50Hz计算,则测量的加速度值比真实的加速度值_____(填“偏大”“偏小”“不变”).
完形填空。 | ||||
Last weekends, my kids along with a few other kids from the neighborhood volunteered to help me wash my car. My 10-year-old daughter came up with the idea of 1 other people's cars as well. It was pretty 2 outside and I had no plans to 3 be ing in the bright sun. She 4 wanted to give lemonade (柠檬汽水) to passers-by for free. I had seen little kids 5 and sell fresh lemonade for a small cost but not free. Although I felt 6 , I decided to help her. 7 she asked me,"What if we 8 this a smile car wash?"I couldn't hold back my tears and 9 her and the other kids to go outside the house and come up with 10 ideas. While I kept myself busy in drying the car, the gang walked up to me with a(n) 11 with beautiful images of smiles. They had " Free Car Wash" written on it and the 12 of their exercise was"smile".It was pretty neat to see a team of kids ranging 5-11 years with the 13 to do something for others. All that seemed 14 and came right from their heart. Noth ing seemed to 15 to them: their playtime, the heat outside-they just wanted to 16 others and do something nice in the community! I helped them make some fresh lemonade and brought out some additional 17 to help clean cars. Passers-by were 18 and one even shouted back to them saying"God bless you, my kids..."One of them even tried giving them a 5 dollars, which they refused. A pretty heartwarming 19 ! I feel blessed by being 20 by such wonderful and loving souls. | ||||
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关于离子通道的叙述不正确的是()。
A.可分为配体门控和电压门控两大类
B.通道的活动需要特殊的激动剂或拮抗剂参与
C.全麻药通过间接或直接作用于钙离子通道而发挥作用
D.全麻药作用的基本原理很可能统一在配体门控通道水平
E.电压门控离子通道在全麻机制上可能不起主要作用