问题
选择题
—Li Lei can _______ it in English.
—Oh, really? [ ]
A. speak
B. talk
C. say
D. /
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—Li Lei can _______ it in English.
—Oh, really? [ ]
A. speak
B. talk
C. say
D. /
答案：C
HCO3-＋OH－ 热的纯碱溶液清洗油污
Al(OH)3(胶体)＋3H＋ 明矾净水