10．下列有关太阳活动及其对地球影响的叙述正确的是_刷题宝

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10．下列有关太阳活动及其对地球影响的叙述正确的是（）

A：太阳光球层上产生黑子和耀斑，二者周期相同

B：从太阳活动极大年到相邻的太阳活动极小年之间的平均周期为11年

C：太阳活动发出电磁波扰动电离层，影响无线电中波通讯

D：太阳大气抛出的高能带电粒子流，使地球磁场扰动产生“磁暴”现象

上一题下一题 0.0难度选择题更新时间:2019-01-27 07:38:13

答案(点此获取答案解析）

D

同类题1

如图所示，小灯泡L上标有“6V 3W”字样．闭合开关，小灯泡正常发光，电流表的示数为1.5A．求：

同类题2

{\begin{cases} 3 x - y = a + 2 \\ x + 5 y = a \end{cases}

的解x、y满足x是y的2倍，求a的值．

同类题3

A: How was your day off, Tina?
B: Oh, it was awful.
A: Really?  1
B: Well, we wanted to go camping, but the weather was terrible.  2
A: Oh, that's too bad. Then what did you do? Did you watch TV at home?
B: No.  3   . It was boring.
A: Sounds terrible, Tina.
B:   4
A: I think I had great fun. I went to the museum and met a famous actor.  5      And I got his autograph.
B: That sounds wonderful.

同类题4

_______of the household rubbish________recycled or reused since the new technology was applied.

同类题5

，则下列结论正确的是（）

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