皮皮学，免费搜题
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【多选题】
标准与法规的功能包括:A.
促进技术创新
B.
实现规模化、系统化和专业化
C.
保证产品质量安全
D.
为消费者提供必要信息
E.
降低生产对环境的负面影响
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】Complete the following sentences with the verbs in the present perfect continuous tense. 用动词的现在完成进行时完成下列句子。 I am tired because I ________ this article all day. (write)
【简答题】Complete the following sentences with the verbs in the present perfect continuous tense. 用动词的现在完成进行时完成下列句子。 Since this morning, the woman ________ alone in her bedroom. (sit)
【简答题】Complete the following sentences with the verbs in the present perfect continuous tense. 用动词的现在完成进行时完成下列句子。 The man _______ to us for the past hour. (lie)
【简答题】flash成组的快捷键是ctrl+( )。
【简答题】用现在进行时完成下列句子:20分 1. ______you__________(fly) a kite? Yes,_______. 2. ______you___________(sit) in the boat? 3. ______he_____________(talk) with me? 4. We_______________(play) football now. 5. What____...
【简答题】Complete the following sentences with the verbs in the present perfect continuous tense. 用动词的现在完成进行时完成下列句子。 Thousands of people _____ for the queen the whole afternoon. (wait)
【简答题】新建合成组的快捷键是:
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