灌酒时瓶内的酒液灌不满,其原因是密封垫、泄压阀、真空阀泄漏。
参考答案:错
— I’m afraid that I’ll fail the math test.
— _____________!
A.Work hard
B.Have a good rest.
C.Well done.
D.Don’t worry
单糖浆有矫味作用,是不含药物的蔗糖饱和溶液浓度为
A.100%
B.85%
C.65%
D.55%
E.75%