我们可以通过哪些方面来观察和描述矿物?_刷题宝

题干

我们可以通过哪些方面来观察和描述矿物?

上一题下一题 0.0难度选择题更新时间:2019-10-24 10:43:53

答案(点此获取答案解析）

解：我们可以通过观察矿物的颜色、颗粒组成、条痕颜色、滴盐酸是否冒泡、硬度、透明度等方面进行描述。

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下表为3个不同小麦杂交组合及其子代的表现型和植株数目。

组合序号	杂交组合类型	子代的表现型和植株数目
组合序号	杂交组合类型	抗病红种皮	抗病白种皮	感病红种皮	感病白种皮
一	抗病、红种皮×感病、红种皮	416	138	410	135
二	抗病、红种皮×感病、白种皮	180	184	178	182
三	感病、红种皮×感病、白种皮	140	136	420	414

据表分析，下列推断错误的是

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了解中国的地形特点，最合适的地图是（　　）

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下列所示的四种生活用具，使用时属于费力杠杆的是（　　）

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短文改错。

Dear Jim,

I'd like to tell you something more about our school sports meet. It was holding on Oct. 6th, it was a fine day. There were over 1,000 students and teachers attended it. Wang Lin, a student from my class won the 100-meters race. He finished the race in 12.6 seconds and broke the school record. The sports meet was really success. That was because we were all trying to do my best. Although I was not one of the winner, I was proud of that we had done.

Looking forward to receive your letter.

Yours,

Li Ping

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如图为某同学测量L₁两端电压的电路，图中有一条导线接错了，接错的导线是（　　）

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