食物脂肪在血液中主要的运输形式是______。
A.长链脂肪酸 B.中链脂肪酸C.短链脂肪酸 D.乳糜微粒E.磷脂
参考答案:D
About 110 million people moved to this city. The population is ____________ as ten years ago.
A.as twice large
B.twice as large
C.as many twice
D.twice as many
CuO和Fe2O3混合粉末中加入200 mL 0.5mol/L HNO3溶液,恰好完全反应(忽略溶液体积变化),所得溶液中c(Cu2+) = c(Fe3+)。下列说法中不正确的是
A.混合粉末的质量为3.2g
B.混合粉末中CuO和Fe2O3的物质的量相等
C.混合粉末中CuO 和Fe2O3的质量相等
D.混合粉末溶于硝酸所得溶液中c( NO3-)为0.5 mo/L