皮皮学，免费搜题
登录
搜题
【单选题】
用你所学的化学知识判断，下列观点有正确的是（ ）A.
元素的化学性质主要决定内质子数
B.
原子是不可再分的粒子
C.
化学反应前后原子的种类一定改变，分子的数目可能改变
D.
CO有毒CO 2 无毒是因为两种物质的分子构成不同
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】西方语言学家——认为，语言符号的任意性是第一原则：即能指和所指的联系是任意的。他说，这个原则支配着整个语言的语言学，是头等重要。（）
A.
索绪尔
B.
乔姆斯基
C.
宏堡特
【简答题】某一成年出租车司机讲述了一个自己不愿意搭载教师的原因：在小学一年级的时候他担任班长，为了感谢班主任，他决定给班主任制作一张新年贺卡。当时全班同学都嘲笑他，而他不顾嘲笑，亲手为班主任制作了贺卡。他原想，班主任会摸着他的头表扬他，结果却是班主任（语文老师，不容忍一个错别字）打开贺卡发现了一个错别字，新年“渝”快，并读了这张贺卡，全班同学都笑了，读完后，班主任当着全体同学的面撕掉了贺卡，并且还跺了几脚。...
【单选题】You will find me online almost always, so there______ be any difficulty reaching me.
A.
must
B.
would
C.
shouldn’t
D.
needn’t
【单选题】I think this bike is a little better than that one, but the shopkeeper charged me almost_______ for it.
A.
as many twice
B.
twice as many
C.
twice as much
D.
as much twice
【简答题】I used to be very close to my father when I was a child. He gave me almost everything I wanted. Whenever I quarreled with my mother, I would turn to my father for comfort. He was everything to me. Tim...
【单选题】The new English dictionary I bought yesterday ________ me almost twenty yuan. A spent
A.
47 . The new English dictionary I bought yesterday ________ me almost twenty yuan. A spent
B.
paid
C.
cost
D.
took
相关题目：