皮皮学，免费搜题
登录
搜题
【判断题】
化学反应速率通常用单位时间(每秒、每分、每小时等)内反应物浓度的减少或生成物浓度 的增加来表示,且只取正值。( )A.
正确
B.
错误
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】I didn’t really want a wallet, but the salesman persuaded me to buy______.
A.
it
B.
one
C.
another
D.
the other
【单选题】The weather was ____ cold that I didn’t want to leave my room.
A.
really
B.
such
C.
so
D.
too
【简答题】Listen to Conversation 2 and complete the sentences. Janet: So when did you start working at London Time Off? Andy: About a year ago. Janet: And I hope you don't mind my(1) ____, but do you like worki...
【单选题】I didn’t really want to end up in some boring office, _____.
A.
to do the photocopies and to make the tea
B.
doing the photocopies and making the tea
C.
done the photocopies and made the tea
D.
to do the photocopies and make the tea
【简答题】My experience of extreme saving I’ve never been very good with money and last year I did something I’ve never done before — I saved up for ten whole months. My friends were planning a trip abroad to c...
【单选题】石油沥青的大气稳定性是指（）。
A.
沥青材料内部阻碍其相对流动的一种特性
B.
石油沥青的黏滞性和塑性随温度升降而变化的性能
C.
石油沥青在外力作用下产生变形而不破坏，除去外力后仍保持变形后的形状不变的性质
D.
石油沥青在热、阳光、氧气和潮湿等因素的长期综合作用下抵抗老化的性能
相关题目：