脑性瘫痪患儿最常见的步态为（）
A.鸭步
B.剪刀步
C.蹒跚步态
D.跨越步态
E.醉酒步态
参考答案：B
I ______ the poor rabbit, but I didn't have the right drugs with me at that moment. [ ]
A. saved
B. had saved
C. could save
D. could have saved
为了不影响颜色的明度和色泽（）。
A.尽量多加助剂及催化剂等
B.按比例加入
C.一点也不能加入助剂
D.加入助剂不会有影响
