题目内容

下列表达正确的是

A. play piano
B. play the football
C. play the guitar
D. play a basketball

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乒乓球

A. badminton
B. tennis
C. volleyball
D. table tennis

I'd like you to meet my friend. _ is Betty and _ is David.

A. She; he
B. It; it
C. This; that
D. Here; there

宿舍，寝室

A. classroom
B. teaching building
C. dormitory
D. living room

已知反应2N2(g) + O2(g) = 2N2O(g)的化学平衡常数为K1θ，反应 N2(g) + 2O2(g) = 2NO2(g) 的化学平衡常数为K2θ，则反应2N2O(g) + 3O2(g) = 4NO2(g)的Kθ是：

A. K1θ－(K2θ)2
B. (K2θ)2－K1θ
C. K1θ/(K2θ)2
D. (K2θ)2/ K1θ