【单选题】下列说法正确的是
A.
△H <0 ,△S>0的反应在温度低时不能自发进行
B.
在其他条件不变时,增大反应物的浓度,可以增大活化分子百分数
C.
因为焓变和熵变都与反应的自发性有关,因此焓变或熵变均可以单独作为反应自发性的判据
D.
NH 4 HCO 3 (g)═NH 3 (g)+H 2 O(g)+CO 2 (g)△H = +185.57kJ/mol能自发进行,原因体系有自发地向混乱度增加的方向转变的倾向
【简答题】A.Social activities. B.Cultural activities. C.Language activities. D.Sports activities.
【单选题】The engineers are so busy that they have no time for outdoor sports activities, ________ they have the interest.
【单选题】_______are dangerous or challenging sports activities.
A.
paragliding and jogging
B.
football and skateboarding
C.
basketball and mountain biking
【简答题】In the traditional usage, sports refer to ______ activities.
【单选题】在其他条件不变,增加样本容量时,下列说法不正确的是
【单选题】The engineers are so busy that they have zero time for outdoor sports activities, ________ they have the interest. [ ]
【简答题】Those who avoid competitive sports in favour of noncompetitive physical activities seem to be looking for ______.
【单选题】Jim is very interested in sports . He can take part in sports activities every ______ .