津液的生成与哪些脏腑有关（）
A.胃
B.肺
C.脾
D.大肠
E.小肠
参考答案：A, C, D, E
一氧化碳与氢气共同具有的化学性质是（ ）
A．无色无味
B．可以在空气中点燃
C．难溶于水
D．在空气中点燃后都生成水
Their school is twice as _____ as ours. That means our school is _____ than theirs.[ ]
A. big; twice smaller
B. small; large
C. big; small
D. small; twice smaller
