下列仪器可以直接用酒精灯火焰加热的是①量筒 ②试管 ③燃烧匙 ④集气瓶 ⑤烧杯 ⑥烧瓶．_刷题宝

题干

下列仪器可以直接用酒精灯火焰加热的是（）

①量筒 ②试管 ③燃烧匙 ④集气瓶 ⑤烧杯 ⑥烧瓶．

A：⑤⑥

B：②③

C：②③④

D：②⑤⑥

上一题下一题 0.0难度选择题更新时间:2012-01-16 08:25:04

答案(点此获取答案解析）

B

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根据图片，判断单词是否正确。

fruit

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默写
①                    ，拾此充饥肠。（白居易《观刈麦》）
②                       ，衡阳雁去无留意。（范仲淹《渔家傲·秋思》）
③                  ，              ，欲与天公试比高。（***《沁园春·雪》）
④                  ，左右流之。窈窕淑女，                  。（《关雎》）
⑤大漠孤烟直，                           。（《使至塞上》）
⑥                               ，古来征战几人回？（《凉州词》）

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地球在公转时，地轴是____现象，而且它的____保持不变．

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补全短文。请阅读下面的对话, 并根据对话的内容, 将下面文本框中的文段大意补充完整。（提示：每空限填一词。）

Julie: Look! The elephants are eating grass. They are so big.

Susan: They are big and friendly to people.

Julie: There are giraffes over there.

Susan: What are they doing?

Julie: They are playing with the elephants.

Susan: Do you like giraffes?

Julie: Yes, I do. They are very cute.

Susan: Are the koalas there sleeping?

Julie: Yes, they are. They usually sleep during the day.

Susan: Is the lion eating there?

Julie: No, it isn't. It's relaxing. It relaxes for 20 hours every day.

The elephants like eating ____. Julie likes giraffes because they are ____. They are ____ with the elephants. Koalas don't often ____ at night. The lion relaxes for 140 hours a ____.

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