冠心病的康复治疗分为()期
A.Ⅰ
B.Ⅱ
C.Ⅲ
D.Ⅳ
E.Ⅴ
参考答案:C
NA代表阿伏加德常数,下列说法正确的是( )
A.在同温同压时,相同体积的任何气体单质所含的原子数目相同
B.17g氨气所含电子数目为10NA
C.在常温常压下,11.2L氮气所含的原子数目为NA
D.2g氢气所含原子数目为NA
A thunderstorm is likely to come. Let’s hurry up so as not to __________ it.
A.catch
B.be caught in
C.be caught
D.catch in