If thousands of people die of hunger, it’s a natural crisis and there’s nothing we can
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Free morphemes were traditionally called root.()
Motivation is not an important factor in second language acquisition except.()
正确的说法是
A. 1摩尔H2占有体积约为22.4升
B. 氧气在标准状况下，占有体积约为22.4升
C. 1摩尔氧气在标准状况下，占有体积约为22.4升
D. 标准状况下，1摩尔水占有体积约为22.4升
E. 32克氧气在标准状况下，占有体积约为44.8升
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