甘草含()
A.针晶
B.砂晶
C.簇晶
D.方晶
E.柱晶
参考答案:D
Try to _____ the children down. They’re too excited.
A.put
B.calm
C.pull
D.push
拖物作业时,索具与所拖部位连接不牢会造成什么后果?