伶仃líng dÿng
伶仃líng dÿng
相关考题:
单位关系如下正确的是()。A、ng/mL=ng/g=mg/kg=mg/L=ppb=10-6B、ng/mL=ng/g=ug/kg=ug/L=ppb=10-9C、pg/mL=pg/g=ng/kg=ng/L=ppt=10-12D、1mL=1000uL
单位关系如下不正确的是()。A、1L=1000mLB、ng/mL=ng/g=mg/kg=mg/L=ppb=10-9;C、pg/mL=pg/g=ng/kg=ng/L=ppt=10-12;D、ng/mL=ng/g=mg/kg=mg/L=ppb=10-6;
单选题男(nán):北京(běijīng)的(de)冬天(dōngtiān)真(zhēn)冷(lěng)啊(ɑ)!女(nǚ):沈阳(shěnyáng)的(de)冬天(dōngtiān)比(bǐ)北京(běijīng)冷(lěng)。问(wèn):哪里(nǎli)的(de)冬天(dōngtiān)更(gèng)冷(lěng)?A北京(běijīng)B深圳(shēnzhèn)C沈阳(shěnyáng)
名词解释题伶仃líng dÿng