皮皮学，免费搜题
登录
搜题
【单选题】
下列说法正确的是（ ）A.
可逆反应达到化学平衡状态时，正、逆反应的速率都为0
B.
催化剂可以使不起反应的物质发生反应
C.
可以找到一种催化剂使水变成油
D.
增大反应物的浓度、提高反应温度都能增大反应速率
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
【简答题】句型转换 1. She used the knife to cut the fruit a moment ago. (改为被动语态) The knife ______ ______ to cut the fruit by her a moment ago. 2. The teacher was angry with him for being late. (改为同义句) The teacher w...
【单选题】At such a time of crisis, we must try to _______ differences of party or class and stick together.
A.
set forth
B.
set back
C.
set down
D.
set aside
【简答题】根据画线单词及句意提示填空。 1. You used to be short . But now you're so ． 2. My brother used to be quiet . But now he is very . 3. His mother is very serious , but his father is quite . 4. I used to be afraid of E...
【单选题】She asked me, “Have you seen my _____?”
A.
sport shoe
B.
sports’ shoes
C.
sport’s shoes
D.
sports shoes
相关题目：