皮皮学，免费搜题
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【简答题】
For this part, you are allowed 30 minutes to write an essay entitled Communication Instruments in three paragraphs. You are given the key words or phrases which you can use to develop the idea. Your essay should be no less than 120 words. Suggested key words and phrases: play an important role in, busy, commonly used, mail, means of communication, telephone, computer, e-mail.
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
【多选题】传统吸收光谱技术在以下( )领域的应用存在明显困难。
A.
化学、物理及环境检测
B.
分子物理学、化学反应动力学
C.
大气光学及环境检测
D.
痕量气体探测及弱吸收测量
【单选题】When the village was submerged by floods, the little girl took _________ in a tree until she was saved by PLA soldiers.
A.
charge
B.
care
C.
refuge
D.
time
【简答题】根据锂离子电池所用电解质材料不同,锂离子电池可以分为 锂离子电池和 锂离子电池。
【简答题】根据锂离子电池所用电解质材料不同,锂离子电池可以分为 锂离子电池和 锂离子电池两大类。
【单选题】The village was wiped out when the dam burst.
A.
wiped with
B.
had a wash
C.
swept away
D.
wasted
【简答题】下列化合物能发生 Hoffmann 重排反应的是( )A. B. C. D.
【简答题】( )是美国政府为实现幼儿教育机会均等的目标而实行的一项重要的计划。
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