病因链(cause chain)
参考答案：
解析：病因链：病因(危险因素)相互存在联系，串起来就构成一条病因链。
It's extremely dangerous for the drivers to _____ speed as the traffic lights are changing. [ ]
A. pull up
B. put up
C. rise up
D. pick up
刚出生的新生儿血红蛋白量为
A．120～180g/LB．130～190g/LC．150～220g/LD．140～210g/LE．110～170g/L
