浅色麦芽的叶芽平均长度,其中为麦粒长0.75~1的比例通常为()左右。
A.25%
B.50%
C.75%
D.100%
参考答案:C
____ you’ve grown up, you should be independent of your parents’ help.
A.Even though
B.In case
C.Just as
D.Now that
为了保证安全阀的灵敏可靠,应定期对安全阀做启跳试验,安全阀定期试验周期为一个月一次。