【单选题】下列说法中错误的是 [ ]
B.
化学变化中的能量变化主要是由化学键变化引起的
C.
化学反应中能量变化的大小与反应物的质量多少无关
【单选题】下列说法中,不正确的是( )
C.
化学反应中的能量变化主要是由化学键的断裂和形成引起的
D.
反应物与生成物总能量的相对大小决定反应是吸热或放热
【判断题】党的十九大报告提出,保持土地承包关系稳定并长久不变,第二轮土地承包到期后再延长二十年。()
【单选题】听力原文:M: Shall we go to John's house warming party this weekend? Everyone is invited. W: Well, you know what John's parties are like. How boring and dull nights with bad food. Do you think I will go ag...
A.
Everyone enjoyed himself at John's party.
B.
The woman didn't enjoy John's parties at all.
C.
It will be the first time for the man to attend John's party.
D.
The woman is glad to be invited to John's house-warming party.
【单选题】对病原微生物或肿瘤细胞无杀伤作用的细胞是
【单选题】下列说法哪项是正确的:( )
B.
新生儿如呼吸达60次/min,提示有病理现象
D.
新生儿可从母体获得免疫力,故新生儿期不易患呼吸道感染
【单选题】听力原文:W: Shall we go to Washington for the coming holiday? Oh, but the weather is terribly had. M: There are many museums, art galleries and restaurants in Washington. I'm very happy to go there, no ma...
A.
He dislikes museums and galleries.
B.
He does not care about the weather.
C.
Going to the beach is the best choice.
D.
He doesn't want to go to Washington.