《食品流通许可证》编号由两个字母+()位数字组成。
A.16
B.15
C.14
D.13
参考答案:C
根据首字母提示,填入一个正确的单词形式。
1. You are good at t ______ to people. They all like you.
2. Let me look at you c______. You aren't hot.
3. I hope to have a happy family s______ in the future.
4. I will work hard to i______ English.
5. Slow is the o______ of fast.
()是连接流道与型腔之间的一段细短通道,它是浇注系统的关键部分。
A.凸模
B.凹模
C.浇口
D.定模