关于“苔痕上阶绿”中植物的描述，正确的是_刷题宝

题干

关于“苔痕上阶绿”中植物的描述，正确的是（）

A：茎中有导管

B：靠种子繁殖

C：叶中有叶脉

D：是监测空气污染程度的指示植物

上一题下一题 0.0难度选择题更新时间:2018-07-18 08:37:35

答案(点此获取答案解析）

D

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如图所示，电流表A_l的示数为0.3A，电流表A的示数为0.5A，电压表V的示数为3V.求：

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用英语写出下列短语

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现有X，Y，Z三种金属，将X，Y分别放入稀盐酸中，X表面无明显变化，Y表面有气泡产生，将X，Y放入Z的硝酸盐溶液中，X，Y表面均无明显变化，这三种金属的活动性由强到弱的顺序为（）

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—Hi, Mrs. Green How was your trip to the United States?

—It was wonderful____

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—I was there for a month.

—Great.____

—Yes, it's a wonderful and exciting city.

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—The city is the main business and cultural center in the Midwest It's famous for its music opera and theaters as well as for its excellent museums.

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—Yes, sure. What would you like to know?

What's it famous for?

How long were you there?

Can you tell me a little more about it?

I really enjoyed it.

How long were you there?

And did you go to Chicago?

You should go there in winter or spring.

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