【单选题】重点是了解工具的内在属性,而不是关心使用工具后所测得结果是研究工具的
【单选题】Silk‘s strength comes from its weak hydrogen bonds working together. 查看材料
【单选题】重点了解工具的内在属性,而不是关心使用工具后所得到的结果的效度是
【单选题】重点了解工具的内在属性,而不是关心使用工具后所测得的结果的效度是
【单选题】A number of different types of bonds maintain the structure of proteins. These include disulphide, hydrogen and ionic bonds, as well as hydrophobic interactions. Some of these are stronger than others...
C.
hydrophobic interactions
【单选题】重点了解工具的内在属性,而不是关心使用工具后所测得的结果的效度是
【单选题】计算机网络的主要功能有( )、数据传输和进行分布处理。
【单选题】疥疮的临床表现为
D.
病因明确,可见红斑、肿胀 水疱某一时期以一种皮损为主。
【单选题】Which of the following statements about hydrogen bonds in water is wrong?
A.
The nearly tetrahedral arrangement of the orbitals about the oxygen atom allows each water molecule to form hydrogen bonds with as many as four neighboring water molecules.
B.
In liquid water at room temperature and atmospheric pressure, however, water molecules are disorganized and in continuous motion, so that each molecule forms hydrogen bonds with an average of only 3.8 other molecules.
C.
In ice, on the other hand, each water molecule is fixed in space and forms hydrogen bonds with a full complement of four other water molecules to yield a regular lattice structure.
D.
Hydrogen bonds account for the relatively high melting point of water, because much thermal energy is required to break a sufficient proportion of hydrogen bonds to destabilize the crystal lattice of ice.