皮皮学，免费搜题
登录
搜题
【单选题】
某有机物能使溴水褪色，也能在一定条件下发生水解反应生成两种有机物，还能发生加聚反应生成高分子化合物，则此有机物中一定含有下列基团的组合是 [ ] ①-CH 3 ②-OH ③-Cl ④-CHO ⑤-CH=CH 2 ⑥-COOH ⑦-COOCH 3A.
③⑤
B.
②⑥
C.
⑤⑦
D.
④⑦
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Thousands of years ago people discovered the phenomenon by chance, and this was _____ the idea of the compass first came from.
A.
how
B.
what
C.
where
D.
that
【简答题】Task 2 Read the passage and match each paragraph with the corresponding aspect of the company.
【单选题】The war went on for years, ______thousands of people.
A.
kill
B.
killed
C.
killing
D.
to kill
【简答题】Read the passage. Match each paragraph with the information it contains.
【单选题】China's history is more than 5 _________ years old. [ ]
A.
thousands of
B.
thousand of
C.
thousands
D.
thousand
【简答题】• 普罗泰戈拉 提出了“ ”的著名命题,认为事物的存在是相对于人的感觉而言的,人的感觉怎样,事物就是怎样。 这一命题不是说人决定着万物的存在或不存在,而是说人的认识决定存在着的事物为什么是这样而不是那样。
【单选题】The lack of ( ) from thousands of years of settlement and clear-cutting prompted the development of stir-frying.
A.
harvest
B.
cooking ingredients
C.
cookers
D.
cooking fuel
【简答题】Match each paragraph with the corresponding measure it describes to clean the lathe.
【简答题】Read the passage and match each paragraph with the corresponding aspect of the company.
相关题目：