高中 解答

有一個鈉原子其原子序是 11、質量數 23,丟掉一個電子後變成 Na ,有關鈉離子的敘述何者正確?

發生化學反應時,下列何者必定發生改變?(甲)原子數目;(乙)原子種類;(丙)分子數目;(丁)分子種 類。

小雅為了判斷甲、乙、丙三種金屬的活性大小,進行以下實驗: 實驗一:取甲和乙分別放入稀硫酸中,甲有一部分溶解並產生氫氣,乙沒有變化。 實驗二:取乙和丙分別放入硝酸銀溶液中,一段時間後,在丙的表面上有銀析出,而乙沒有變化。 根據以上實驗可得知甲、乙、丙三種金屬的活性大小,下列何者正確?

Choose an incorrect sentence.

Some book towns run regular activities to attract visitors. , an annual book festival is held in Hay-on Wye, UK.

My sister always dresses up whenever she goes out as if she a super star.

Sherry came up with an idea to solve the puzzle, with pride and a sense of achievement.

what Sherry will do next. She doesn’t play by the rules.

Rose felt embarrassed because her manager bitterly criticized that she was fat attend the event.

Not until the little girl saw her mom show up . 1

The air crash took the lady’s life and her kids motherless.

Dangerous the journey would be, the adventurers still decide to go straight across the desert.

Katy had difficulty finding the appropriate dress for the party, so she asked her friend to choose one that best her.

Because of the tight schedule, we can only afford a visit to the museum.

Only with the manager’s written can you get access to the classified document.

The doctor has to obtain the parents’ for the operation on their child’s heart.

Companies need to be able to quickly adapt to the markets to survive in this fast-changing era.

Exercise can strengthen our muscles. , it can help people relieve pressure and feel energetic.

After the marathon, the runners will be so hungry that they will eat up food they see on the dining table.

The singer complains that her is invaded by paparazzi all the time. They always follow her whenever she has personal events.

The villagers stay highly after the big earthquake struck at midnight. They are afraid that there will be aftershocks.

Linda that her boyfriend would bring her to a fancy restaurant on Valentine’s Day, but he just stayed at home the whole day.

When you give an oral presentation, it is better to use diagrams to your points instead of using text only.

The constant TV breaks prevented me from focusing on the plot of the soap opera.