一、枚举法认识电解质、非电解质的概念 电解质是指在水溶液里或熔融状态下能够导电的化合物；非电解质是指无论是在水溶液里或熔融状态下都不导电的化合物。下面通过实例加强对...

必修一 1.冠状病毒没有细胞结构，只能寄生于活细胞中。这说明（细胞是生物体结构和功能的基本单位，生命活动离不开细胞）。 冠状病毒需要依靠活细胞合成蛋白质，这说明（蛋白质...

必修一 1.冠状病毒没有细胞结构，只能寄生于活细胞中。这说明（细胞是生物体结构和功能的基本单位，生命活动离不开细胞）。 冠状病毒需要依靠活细胞合成蛋白质，这说明（蛋白质...

初中几何公式定理：线 1、同角或等角的余角相等 2、过一点有且只有一条直线和已知直线垂直 3、过两点有且只有一条直线 4、两点之间线段最短 5、同角或等角的补角相等 6、直线外一...

原卷试题 一、词形转换(用所给单词的正确形式填空) 1.The task given by the boss is as good as done, and we are to sum up our working experience after its __________(accomplish). 2.The __________(abandonment)car became a w...

练习1 (a ─ against) 1. It is believed that graduate from well-known university is more likely to find a good job. A. a; the B. a; a C. the; a D. the; the 2. It’s hard to measure his when we haven’t seen his work. A. ability B. appli...

Ⅰ.阅读理解 (2019·山东济宁摸底)After nearly half a century behind the wheel, Hisao Matsumoto, 85, is not ready to stop driving.“I’m not that old yet，” he says.“I still have 15 more years to go till I reach 100.” Mr.M...

练习1 (age ─ another) 1. The group are all the same age. A. of B. in C. with D. for 2. If you go his plan, you will be punished. A. through B. ahead C. on D. against 3. A good salesman must be if he wants to succeed. A. aggression B. ag...

练习 阅读理解+七选五 Ⅰ.阅读理解 (2019·福建闽侯摸底)The Opening of a new bookstore, the Book Green Hook Sunday, September 5, 9 a．m.to 9 p．m. You will not want to miss the opening of your new neighbourhood bookstore!...

一、枚举法认识电解质、非电解质的概念 电解质是指在水溶液里或熔融状态下能够导电的化合物；非电解质是指无论是在水溶液里或熔融状态下都不导电的化合物。下面通过实例加强对...