【单选题】What made the writer start doubting the possibility of the trip?
A.
Getting a Russian visa.
B.
The cold winter in Mongolia.
C.
Inconvenient transport.
D.
Poor living conditions.
【判断题】在戏剧人物胚胎建构阶段,人物的关系只有矛盾关系。()
【简答题】已知 NaHCO 3 (s) 热分解反应为 2NaHCO 3 (s)==Na 2 CO 3 (s)+CO 2 (g)+ H 2 O(g) ,今将 NaHCO 3 (s) , Na 2 CO 3 (s) , CO 2 (g) 和 H 2 O(g) 按任意比例混合,放入一个密闭容器中,当反应建立平衡时, K= ; Φ= ; f = 。
【单选题】What made the writer begin to cook?
C.
His mother's delicious food
D.
The information about cooking on TV
【单选题】准确反映资本家对雇佣工人剥削程度的概念是()。
【简答题】已知:A为淡黄色固体,E、X常温下为气体,A、B、C、D含有相同的金属离子,其转化关系如右(部分产物已略去)。 请回答下列问题: (1) 常温常压下,3.9gA与足量的氷充分反应放出热量akJ,写出该反应的热化学方程式 ________ (2) 向500mL0.3mol/L的B溶液中缓慢通入2.24L(标准状况下)的气体X,则所得混合溶液中各离子浓度由大到小的顺序是 _______________...
【单选题】What made the writer start doubting the possibility of the trip?
A.
Inconvenient transport.
B.
The cold winter in Mongolia.
C.
Getting a Russian visa.
D.
Poor living conditions.