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【单选题】
图 中所示为何种寄生虫虫卵?A.
日本血吸虫卵
B.
肺吸虫卵
C.
肝吸虫卵
D.
曼氏迭宫绦虫卵
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举一反三
【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
B.
在碱性条件下，可开环生成内酯
C.
C12-烯醇基，可与金属离子鳌合
D.
C10-酚羟基，可与金属离子赘合
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】选择括号内合适的词填空。 1. My aunt likes _____________ (dance / dancing) very much. She can dance _____________ (beautiful / beautifully). 2. There _____________ (isn't / aren't) any water in the glass. 3. Look!...
【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
A.
黄色结晶粉末、味苦
B.
不易配制成注射液
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
D.
与金属离子形成不溶性的螯合物
E.
呈酸碱两性
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