【判断题】G and C bases are connected by two hydrogen bonds
【判断题】出现四肢不自主抖动一定是发生了惊厥。( )
【单选题】Carbon can form _______ bonds with hydrogen atoms.
【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】In which process are hydrogen bonds broken?
C.
2HI(g) → H 2 (g) + I 2 (g)
D.
CH 4 (g) → C(g) + 4H(g)