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1) (使)加速.速度 2) 千米.公里 3) 穿越過.十字形的東西 4) 燈光.光亮.光.淺色的.輕的.點燃 5) 錯過.思念 6) 傷害 7) 當--的時候.什么時候 8) 轉彎.轉變.輪流的順序 9) 橋 10) 事故.意外的事 11) 小山.丘陵 12) 死 13) 更換.改變.零錢.找頭 14) 晚的 15) 公眾(的).公共的 16) 危險 17) 規則.規定.統治.支配 18) 夫人.太太 19) 橫穿過 20) 小心的.仔細的 21) 會.應當.應該 22) 沿著 23) 快的 24) 在--之前.在--前面 25) 米.公尺 26) 直到--為止 27) 票券.單 28) 使用.利用 29) certainly 30) obey 31) cleaner 32) sidewalk 33) crosswalk 34) straight 查看更多

 

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請閱讀下面短文。根據短文內容從下面方框內的六個選項中,選擇五個還原到文中,使短文意思通順、結構完整。
A few of years ago, I went to Australia for a meeting with my friend, Chris. We decided to drive across country to Brisbane after the meeting ended(結束). The drive was going to take four days and most of it was across the desert(沙漠),    1   
The first day was a lot of fun as we were excited and laughing at each other's stupid(愚蠢的) jokes. By the third day of driving in the seemingly endless(無邊的) desert, we began to get bored. We had been quiet for a few hours when in the distance(在遠處) Chris found some kangaroos(袋鼠). We were both excited and decided to get a closer(更近) look.  2  .We got closer and closer, and Chris was doing 110 kilometers per(每) hour. We were very close to the kangaroos—too close—when we heard a loud BANG!
Chris stopped the car and we got out. Behind the car was a larger kangaroo lying completely still on the ground.   3  He took off his sunglasses and put them on the kangaroo and did the same with his jacket. Then, he put his arm around the kangaroo and told me to take a photo of them together.  4  While I was focusing(聚焦) the camera, I saw the kangaroo move. It suddenly woke up(醒來), looked at Chris, and jumped away into the distance before we could do anything.
I started laughing(笑) but Chris looked very serious(嚴肅).   5   I started laughing even harder(更厲害). I stopped laughing, however, when he said that our car keys were also in the jacket!

A. Chris speeded up(加速) to catch up with the kangaroos.
B. He said his wallet and passport(護照) were in the jacket.
C. In order to (為了)get there in three days, we drove very fast.
D. so we had to take food, water, and extra (額外的)gas with us.
E(AB). Chris went over to the kangaroo and put his baseball cap on its head.
F(CD). I was still surprised, but I took out my camera.

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請閱讀下面短文。根據短文內容從下面方框內的六個選項中,選擇五個還原到文中,使短文意思通順、結構完整。

A few of years ago, I went to Australia for a meeting with my friend, Chris. We decided to drive across country to Brisbane after the meeting ended(結束). The drive was going to take four days and most of it was across the desert(沙漠),    1   

The first day was a lot of fun as we were excited and laughing at each other's stupid(愚蠢的) jokes. By the third day of driving in the seemingly endless(無邊的) desert, we began to get bored. We had been quiet for a few hours when in the distance(在遠處) Chris found some kangaroos(袋鼠). We were both excited and decided to get a closer(更近) look.  2  .We got closer and closer, and Chris was doing 110 kilometers per(每) hour. We were very close to the kangaroos—too close—when we heard a loud BANG!

Chris stopped the car and we got out. Behind the car was a larger kangaroo lying completely still on the ground.   3  He took off his sunglasses and put them on the kangaroo and did the same with his jacket. Then, he put his arm around the kangaroo and told me to take a photo of them together.  4  While I was focusing(聚焦) the camera, I saw the kangaroo move. It suddenly woke up(醒來), looked at Chris, and jumped away into the distance before we could do anything.

I started laughing(笑) but Chris looked very serious(嚴肅).   5   I started laughing even harder(更厲害). I stopped laughing, however, when he said that our car keys were also in the jacket!

A. Chris speeded up(加速) to catch up with the kangaroos.

B. He said his wallet and passport(護照) were in the jacket.

C. In order to (為了)get there in three days, we drove very fast.

D. so we had to take food, water, and extra (額外的)gas with us.

E(AB). Chris went over to the kangaroo and put his baseball cap on its head.

F(CD). I was still surprised, but I took out my camera.

 

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實驗室用銅制取硫酸銅,將適量硝酸分多次加入到銅粉與稀硫酸的混合物中,加熱使之反應完全,通過蒸發、結晶得到硫酸銅晶體。
(1)為了節約原料,硫酸和硝酸的物質的量之比最佳為:    ;為了吸收該反應中產生的尾氣,請選擇下列中合適的裝置       

(2)為符合綠色化學的要求,某研究性學習小組進行如下設計:
第一組:以空氣為氧化劑法
方案1:以空氣為氧化劑。將銅粉在儀器B中反復灼燒,使銅與空氣充分反應生成氧化銅,再將氧化銅與稀硫酸反應。
方案2:將空氣或氧氣直接通入到銅粉與稀硫酸的混合物中,發現在常溫下幾乎不反應。向反應液中加少量FeSO4,即發生反應,生成硫酸銅。反應完全后,加物質甲調節pH ,鐵元素全部沉淀(一般認為鐵離子的濃度下降到10-5mol·L-1,就認為沉淀完全),然后過濾、濃縮、結晶。
已知:Ksp[Cu((OH)2]≈10-22, Ksp[Fe((OH)2]≈10-16,  Ksp[Fe((OH)3]≈10-38
請回答下列問題:
如開始加入的銅粉為3.2 g,最后所得溶液為500 mL,溶液中含有鐵元素0.005 mol。
①方案1中的B儀器名稱是       
②為了使鐵元素全部沉淀,應調節pH至少為_________。
③方案2中甲物質可選用的是             
A.CaOB.NaOHC.CuCO3D.Cu2(OH)2CO3 E、Fe2(SO4)3
④反應中加入少量FeSO4可加速銅的氧化,用離子方程式解釋其原因        
第二組:過氧化氫為氧化劑法
將3.2g銅絲放到45 mL 1.5mol·L-1的稀硫酸中,控溫在50℃。加入18mL 10%的H2O2,反應0.5h,升溫到60℃,持續反應1 h后,過濾、蒸發濃縮、減壓抽濾等,用少量95%的酒精淋洗后晾干,得CuSO4·5H2O 10.5g。
請回答下列問題:
⑤反應時溫度控制在50℃~60℃不宜過高的原因是         
⑥本實驗CuSO4·5H2O的產率為         

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