Mr. Schmidt was very glad Martha won the scholarship jacket — she thoroughly __________ the prize.（）
你可能感興趣的試題
Would Lis tell Mry the messge left by Mr. Brown Yes, she sid she would be very gldWould Li
s tell Mry the messge left by Mr. Brown Yes, she sid she would be very gld to pss the messge. B．No, she refused to pss Mry the messge for Mr. Brown. C．No. she couldn’t becuse she hd forgotten Mr, Brown’s telephone number.A．Yes, she said she would be very glad to pass the messageB．No, she refused to pass Mary the message for Mr． Brown．C．No． she couldn’t because she had forgotten Mr, Brown’s telephone number．
無機(jī)過氧化物的科學(xué)研究開始于18世紀(jì)初，人們相繼制得了過氧化鋇、過氧化鈉、過氧化鉀、過氧化氫等。
目前無機(jī)過無機(jī)過氧化物的科學(xué)研究開始于18世紀(jì)初，人們相繼制得了過氧化鋇、過氧化鈉、過氧化鉀、過氧化氫等。目前無機(jī)過氧化物已逐漸成為無機(jī)化學(xué)的一個分支。下列有關(guān)幾種過氧化物的敘述中正確的是 [ ]過氧化鋇的化學(xué)式是B 2 O 2 B．1 mol 過氧化鈉或過氧化鋇跟足量的水反應(yīng)都生成1 mol 氧氣 C．過氧化鈉中，陽離子和陰離子的個數(shù)比為1:1 D．過氧化鈉和過氧化鋇都有強(qiáng)氧化性A．過氧化鋇的化學(xué)式是Ba 2 O 2B．1 mol 過氧化鈉或過氧化鋇跟足量的水反應(yīng)都生成1 mol 氧氣C．過氧化鈉中，陽離子和陰離子的個數(shù)比為1:1D．過氧化鈉和過氧化鋇都有強(qiáng)氧化性