用超速离心法可将血浆脂蛋白分为乳糜微粒、前β-脂蛋白、β-脂蛋白和α-脂蛋白。
参考答案：错
When you lose your way in the city, you can _________ the policemen _________help.
A．look; for
B．find; out
C．tell; to
D．ask; for
