—Excuseme.Whereisthepostoffice?—Sorry,Idon'tknow.Iamnew...
練習題2.56W
問題詳情:
—Excuse e is the post office?
—Sorry,I don't know.I am new ________ town.
A.in B.at C.on D.from
【回答】
A
知識點:介詞和介詞短語
題型:選擇題
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蠟燭燃燒剛熄滅時產生的白*是什麼?提出問題:蠟燭剛熄滅時,總會有一縷白*冒出,它的成分是什麼呢?猜想與假設:A...
問題詳情:蠟燭燃燒剛熄滅時產生的白*是什麼?提出問題:蠟燭剛熄滅時,總會有一縷白*冒出,它的成分是什麼呢?猜想與假設:A.白*是燃燒時生成的二氧化碳;B.白*是燃燒時生成的水蒸氣;C.白*是石蠟蒸氣凝成的石蠟固體小顆粒進行實驗:⑴吹滅蠟燭,立即用一個蘸有澄清石灰水的燒杯罩住白...
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______Icouldn’tfullyunderstandwhathewantedtoshowinhispa...
問題詳情:______Icouldn’tfullyunderstandwhathewantedtoshowinhispaintings,Ithoughthisworksquiteimpressive. A.As B.Since C.If ...
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如圖所示,一質量爲m的物塊恰好沿着傾角爲的斜面勻速下滑。現對物塊施加一個豎直向下的恆力F。則物塊( ) ...
問題詳情:如圖所示,一質量爲m的物塊恰好沿着傾角爲的斜面勻速下滑。現對物塊施加一個豎直向下的恆力F。則物塊( ) A.將減速下滑 B.將加速下滑 ...
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下列物質的稀溶液中,溶質的*、陽離子個數之比爲1:2的是( ) A.Na2HPO4B.NaHSO4C.(NH...
問題詳情:下列物質的稀溶液中,溶質的*、陽離子個數之比爲1:2的是()A.Na2HPO4B.NaHSO4C.(NH4)2SO4D.K2S【回答】考點:鹽類水解的應用.專題:鹽類的水解專題.分析:首先判斷離子化合物的*陽離子組成,然後判斷離子是否能夠水解,進而可判斷溶質的*、陽離子個數之比.解答:解:A.HPO42﹣水解,*、...
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