饽荠是中国的特产,生长在水田里,它皮呈黑色而肉雪白,嫩则爽甜,老则粉质重,生吃、熟吃 发布时间:2017-06-25 15:13 │ 来源:www.tikuol.com 题型:判断题 问题: 饽荠是中国的特产,生长在水田里,它皮呈黑色而肉雪白,嫩则爽甜,老则粉质重,生吃、熟吃都可以。因生长在泥中,最好熟吃。
题型:判断题 19世纪化学家对氧化锆的化学式有争议,便进行了系列的实验来验证.经测定锆(Zr)原子核内有51个中子,核外有40个电子,其氯化物的相对分子质量为233.由此推出与氯化物价态相同的氧化锆,其化学式为( )A.ZrOB.Zr2OC.Zr2O3D.ZrO2 查看答案
题型:判断题 —I called you at school at half past eight last night, but nobody answered. —Oh, I _ in my office at that time. [ ]A. will work B. worked C. was working D. had worked 查看答案