问题
选择题
下列实验装置设计正确,且能达到目的的是:
答案
答案:A
氢氧化钠是碱,应放在碱式滴定管中,B不正确。蒸发应该用蒸发皿,不能用坩埚,坩埚是加热固体的,C不正确。石油的分馏需要温度计控制温度,D不正确。因此正确的答案选A。
下列实验装置设计正确,且能达到目的的是:
答案:A
氢氧化钠是碱,应放在碱式滴定管中,B不正确。蒸发应该用蒸发皿,不能用坩埚,坩埚是加热固体的,C不正确。石油的分馏需要温度计控制温度,D不正确。因此正确的答案选A。
根据句子内容选填合适的词语。 | |
2. Tom likes to play basketball. Kelly likes to play ping-pong. They are ____________. 3. Coca likes to read books. Toto likes to sing songs. They are ____________. 4. My father likes shirts. My mother likes skirts. They are ____________. 5. He likes pink. She likes purple. They are ____________. |