【简答题】用所给词的适当形式填空。 1. My sister is a _____________ (dance), she _____________ well. 2. Does the woman _____________ (do) some _____________ (clean) in the evening? 3. The old men work on a farm , they are _...
【简答题】用动词的正确形式填空。 1、Look, I (dance) beautifully. 2、A: What they (talk) about ? B : They ( talk ) about the stamps. 3、Mary ( cook ) nice food for her family now. 4、A: Why you ( not, turn) off the TV? B: ...
【多选题】下列四环素类药物化学性质的叙述正确的是哪些
A.
在酸性条件下,C6-OH易脱水形成脱水化合物
E.
C4位上的二甲氨基在pH 2~6条件下,可发生差向异构化反应
【简答题】用所给词的适当形式填空。 1. Look, some girls _________ (dance) over there. 2. Some students _________ (sit) under the tree, they are talking happily. 3. Eric often _________ (have) bread and milk for breakfast. 4...
【简答题】根据句意,用所给词的适当形式填空。 1. He found many people ______________ (dance) there. 2. My idea is quite different from ____________ (she). 3. Pop music is ____________ (live) and good to dance to. 4. Sally is a c...
【多选题】下列四环素类药物的性质叙述正确的是
C.
C4位上的二甲氨基在pH2-6条件下,可发生差向异构化反应