您所在的当前位置：初中生物试题 >

显微镜的基本构造和使用方法

> 使用显微镜的低倍镜观察装片的步骤是（　　） ①将装片放在载物台上②调节粗准焦螺旋，使镜筒徐徐上升到适当高度③调节粗准焦螺旋，使镜筒下降到一定高度④转动转换器，使低倍镜对准通光孔⑤调节光圈和反光镜，取得明亮视野． A．⑤④③②① B．①②③④⑤ C．②④⑤①③ D．②④①⑤③

问题：

发布时间：2024-09-13

使用显微镜的低倍镜观察装片的步骤是（　　）
①将装片放在载物台上②调节粗准焦螺旋，使镜筒徐徐上升到适当高度③调节粗准焦螺旋，使镜筒下降到一定高度④转动转换器，使低倍镜对准通光孔⑤调节光圈和反光镜，取得明亮视野．

A．⑤④③②① B．①②③④⑤ C．②④⑤①③ D．②④①⑤③

参考答案：

提问用户：L2***aHf

可能感兴趣的题目：

1 抗战初期，国民政府在正面战场先后组织的会战有 ①淞沪会战②太原会战③徐州会战④武汉会战 [ ] A．①②③④ B．①②③ C．②③④ D．①③④
2 若等差数列{a n}的前三项为x-1，x+1，2x+3，则这数列的通项公式为（　　） A．an=2n-5 B．an=2n-3 C．an=2n-1 D．an=2n+1
3 下列不属于生物性状的是 [ ] A．有的人天生金发 B．有的茶树开红花 C．有的玉米是甜的 D．有的石头是红的
4 选择与句中划线部分意义最接近的解释，并将其字母代号填入答题卷相应空格内。小题1:Yang Shanzhou becomes well-known in China for planting so many trees for people. A．great B．famous C．friendly D．warm 小题2:Try again, maybe you will come up with a better idea. A．turn up B．put up C．get up D．think up 小题3: It’s a chicken-and-egg question. I can’t answer you now. A. easy 13. clear C. difficult D. funny 小题4:Come and join us. We are short of hands. A．We need help. B．We hurt our hands. C．Our hands are short. D．We can do it by ourselves, 小题5:--Dad, did you tell mother about our gift for her birthday? --No. Don’t let the cat out of the bag. Let’s give her a surprise A．ask her B．let her know C．take away the eat D．give her a eat
5 I’m sorry to keep you _______ for almost two hours. A．wait B．to wait C．waiting D．waited
6 Here are some tips on how to talk with your parents. Try to start your talk with something fun. This will make talking easier. For example, ask your parents questions about their day. They love this! Make it clear what you want to tell your parents if they have an opinion, let them finish and don’t disturb. Ask them to do the same for you. Show them respect by listening to them carefully. Look at their eyes sincerely. Be honest. Honesty builds trust(信任). Life is good when your parents trust you. If your parents don’t understand, that’s OK. It doesn’t mean they don’t love you or they’re not trying. Sometimes you have to explain things to them again or in a different way. When you finish the talk, thank them for listening. Say something like, “Thanks! That helped.” It will let them know this is important to you, and make them want to do it more often. If you feel there are still things to talk about, set up a time with them to talk about it another day. 小题1:What’s the main idea of this passage? A. We should show respect to our parents. B. There are some ways to talk with our parents. C. It’s important to trust our parents. 小题2:What should we do when our parents have some opinions? A. Let them finish and don’t disturb. B. Let them listen to you. C. Argue with them and then say sorry. 小题3:Why should we look at their eyes while listening? A. Because they make us do that. B. Because this shows we agree with what they say. C. Because this makes them feel respected. 小题4:When we finish the talk, we should tell our parents that we _______ what they have done for us. This will let them know talking is important to us. A. are careful of B. are thankful for C. are satisfied with 小题5:Which is the best title for this passage? A. Some Tips on How to Talk with Parents. B. Respect Parents. C. Try to Talk with Parents.
7 人和动物的根本区别是： A．会不会缝制衣服 B．会不会使用自然火 C．会不会制造工具 D．会不会建筑房屋
8 某印染厂上报的统计资料显示新鲜工业用水0.8万t，但其水费单显示新鲜工业用水1万t，无监测排水流量，排污系数取0.7,其工业废水排放( )万t。 A 1.26 B 0.56 C 0.75 D 0.7
9 地面锚杆正确的施作顺序是(　　)。 A 钻孔→吹净钻孔→插入锚杆→灌浆→孔口固定锚杆 B 钻孔→吹净钻孔→灌浆→插入锚杆→孔口固定锚杆 C 钻孔→吹净钻孔→插入锚杆→孔口固定锚杆→灌浆 D 钻孔→插入锚杆→吹净钻孔→灌浆→孔口固定锚杆
10 阅读下面这首元曲，然后回答问题。 [双调]殿前欢夏薛昂夫　　柳扶疏，玻璃万顷浸冰壶 [注]。流莺声里笙歌度，士女相呼。有丹青画不如。迷归路，又撑入荷深处。知他是西湖恋我、我恋西湖？　　[注]冰壶：指月亮。（1）曲中作者为什么对西湖的夏日景象产生出了“有丹青画不如”的感受？ ____________________________________________________ （2）宋代词人李清照《如梦令》“兴尽晚归舟，误人藕花深处、争（通“怎”）渡。争渡。惊起一滩鸥鹭”与薛昂夫曲中“迷归路，又撑入荷深处”都有表现流连忘返，乐而迷路的相似之处，但在表达这种感情的写法上有所不同。试简要说明这种写法的不同。 ____________________________________________________