A:to be worked out
B:working out
C:to work out
D:working them out
选出恰当的应答语。
A.I'm eleven years old.
B.It's a toy boat.
C.I have eight.
D.Yes.I do.
E.I see thirteen.
( 1 )____( 2 )____( 3 )____( 4 )____( 5 )____
小明用一定量6%的氯化钠溶液配制50g 3%的氯化钠溶液.
(1)需要6%的氯化钠溶液的质量是____ g;
(2)在配制过程中需要的主要玻璃仪器有:烧杯、量筒、胶头滴管、____ .