【简答题】Fill in the following blanks with the expressions given below. Change the forms where necessary. 1) There is no doubt that stress can ________ illness(疾病). 2) The match __________________ until tomorr...
【单选题】下列有关氧化数的叙述中,错误的是
B.
离子团中,各元素的氧化数之和等于离子的电荷数
【单选题】下列有关氧化数的叙述中,错误的是
B.
离子团中,各原子的氧化数之和等于离子的电荷数;
【简答题】My brother wanted to learn swimming and decided to the swimming pool in the sports center. ( take full advantage of )
【简答题】My brother wanted to learn swimming and decided to the swimming pool in the sports center.
【简答题】Rewrite the sentences that begin with the words given. My brother wanted to play volleyball with his friends--- that’s all. All ______________________________________.
【判断题】氧化数有正负之分,既可以是整数,也可以是分数。