某物体做直线运动的v-t图象如图所示，据此判断下图（F表示物体所受合力，x表示物体的位移）四个选项中正确的是
A．
B．
C．
D．
答案：B
If travel books are good, they will, ________ their specific information, give an extra introductions.[ ]
A. in response to
B. in addition to
C. on account of
D. in favour of
在糖原合成中作为葡萄糖载体的是
A．ADP
B．GDP
C．CDP
D．TDP
E．UDP
