--Thank God you are safe!

---I stepped back , just _________ to avoid the racing car.

A．in need

B．in case

C．in time

D．in turn

机体的生长发育，主要取决于

A．血液的营养

B．津液的滋润

C．水谷精微充养

D．肾精的充盛

E．心血充盈