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據報載甲苯是一種碳氫化合物,常溫時為無色的液體,具有特殊的氣味且難溶於水,是製造塗料、黏著劑與指甲油時 常用的溶劑,長期接觸可能會對神經系統造成傷害,使用時宜多加小心。根據上述,甲苯應為下列哪一類有機化合物?
佳靜取不同的物質,依下列流程進行實驗並觀察結果,當佳靜以下列哪一種物質作此試驗,就不會得到下述的結果?
(甲)HCl;(乙)SO2;(丙)NH3;(丁)MgO;(戊)CaO,上述物質的水溶液能使紅色石蕊試紙變藍色的共有幾項?
如(圖一)所示是三種有機化合物的分子結構示意圖。若以 、 和 分別代表氫原子、碳原子和氧原子,則關於這三 種有機化合物的學名,下列何者正確? 甲 乙 丙 (圖一)
如(圖六),△ABC 中,D 點在 BC 上,且 BD 的中垂線與 AB 相交於 E 點,CD 的中垂線與 AC 相交於 F 點。已知 △ABC 的三個內角皆不相等,根據(圖六)中標示的角,判斷下列敘述何者正 A 確? 4
如(圖五),△ABC 中,AC>BC>AB,在△ABC 內找一點 P,使得 P 點到 BC、AB等距離,且 P 點到 B、 C 兩點也等距離,試問可以用下列哪一種方法找到 P 點?
如(圖四),有兩個四邊形 ABCD、EFGH,連接兩條對角線 AC ̅̅̅̅, (圖三) 其中甲、乙、丙、丁分別表示△ABC、△ACD、△EFG、△EGH。 若∠ACB=∠CAD=∠EFG=∠EGH=70°,∠BAC=∠ACD=∠EGF=∠EHG=50°, 則下列敘述何者正確?
(圖三)為江江用尺規作圖找 P 點的結果,請依據作圖痕跡判斷,下列敘述 何者正確?
如(圖二),△ABC 中,以尺規作圖在 AC 上分別取 P、Q、R 三點, L 其中直線 L 為 AB 的中垂線,依據尺規作圖痕跡判別下列何者為等腰三角形? P Q
如(圖一),直線 L、M、N 相交於 O 點,若∠1=100°,∠3=41°,則下列選項 何者有誤?
3942 mg.
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5 kcal. 6. A fourteen-year-old boy like Jairo should not have more than 2400 mg of sodium in a day. If he eats 3 packages of Konjac Strips, how much more sodium will he have than what is recommended (建議)?
safety
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Because they use water to move to new places. 4. The word damage in line 4 is close to _____________.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 10.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 9.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 8.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 7.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 6.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 5.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 4.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 3.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 2.
The chocolate companies behind the cocoa farms should (8) child workers. To help these children, (9) people fight for their rights. Some choose (10) buy chocolate from these companies, and others tell the children’s sad stories. Now it is time for a change. 1.
Listening to students ________ the piano outside the meeting room is a favorite activity at Lujiang Junior High School.
Michael watched a little girl in red __________ her doll, laughing and talking to it in the rainforest on a scary night.