【单选题】If a car is driven by a driver, not the host, which seat is more hornorable, the left seat at the back or the seat at the front?
A.
the left seat at the back
【单选题】平面一般力系独立平衡方程的数目为 ( ) 。
【单选题】下列关于食品添加剂说法正确的是
A.
食品添加剂都是人工合成的化学品,都有副作用,不可食用。
D.
着色剂仅能使食品颜色鲜艳,不能改变营养,故不属于食品添加剂
【单选题】平面汇交力系,平面力偶系,平面平行力系,平面一般力系独立平衡方程的个数分别为?
【简答题】Most left-handed women feel comfortable by holding their babies in their left arm and keep the right arm free.
【单选题】平面一般力系独立平衡方程的数目为( )个
【单选题】下列关于食品添加剂的说法不正确的是( )。
【单选题】The couple’s quarrelling and fighting last Sunday ___ each other . I think so . Nancy was in the arm and she blamed that her arm the whole week .
A.
wounded ; injured ; was hurting
B.
hurt ; hurt ; was hurting
C.
hurt ; wounded ; was hurting
D.
injured ; hurt ; was wounding