【单选题】最近科学家发现,水在一157aC超低温、正常压力或真空条件下仍呈液态,比蜂蜜还粘 稠。下列关于这种“高浓度液体水”的说法正确的是:
【简答题】生命活动至少包括 、 和 三个基本特征。
【简答题】地理空间数据通常具有 、 和 三个基本特征。
【判断题】基层就业项目包括国家公务员、地方公务员考试等。
【单选题】洁净室是空气悬浮粒子浓度受控的房间,其中悬浮粒子的尺寸范围在( )的固体和液体粒子?
【简答题】科学家在研究 DNA 分子复制方式时,进行了如图所示实验,请据图回答。 ( 1 )复制过程除需要模板 DNA 、脱氧核苷酸外,还需要 ______________ 等(至少答两点)。 ( 2 )请设计实验三(在上图中补充文字并画出 “ 结果 C” ),证明 DNA 复制的特点为半保留复制。 ( 3 )上述实验中,实验一、实验二起 ________________ 作用。
【单选题】听力原文: The number of speakers of English in Shakespeare's time is estimated to have been about five million.Today it is estimated that some 300 million people speak it as a native language,mainly in th...
A.
Languages people use in international communication.
B.
The popularity of English as a world language.
C.
The development of English as a native language.
D.
The variety of English in spoken and written forms.
【简答题】The number of speakers of English in Shakespeare’s time is estimated(估计) to have been about five million. Today it is estimated that some 260 million people speak it as a native language, mainly in th...
【判断题】同一种液体的粘度在不同的温度和压力下是不相同的 。