问题
选择题
It's raining outside. So please my umbrella, but don't forget to ______ it back tomorrow.
[ ]
A. take; take
B. bring; take
C. take; bring
D. bring; bring
答案
答案：C
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It's raining outside. So please my umbrella, but don't forget to ______ it back tomorrow.
[ ]
A. take; take
B. bring; take
C. take; bring
D. bring; bring
答案：C
SO3(g)，K1=20，则相同温度下2SO3(g)