【判断题】根据UCP600的规定,信用证上未明确注明可否撤销字样的,应视作为不可撤销信用证,未明确注明可否转让字样的应视作为不可转让信用证。( )
【简答题】目前保存食物的方法越来越多,如冷藏、冷冻、干燥、罐装等,但食物的保存都会借助食品袋来完成,那么通过食品袋上的生产日期和保质期,我们可以了解到该食物是否新鲜。请以“食品袋”为主题设计大班的活动计划。
【单选题】肉类可以放在冰箱冷冻室中储藏较长时间,也可以通过腌制保存较长时间.这两种食品保存方法的共同之处是( )
【多选题】People attend academic conferences for _________.
【单选题】Which one of the following is NOT the reason for a scholar to provide academic service?
A.
Academic service is a way to integrate into the world of science and technology.
B.
Academic service is a way to have an influence in international academic community.
C.
Academic service is paid much.
D.
Academic service proves that you play an important role in academic community.
【简答题】WindowsNT/2000安全模型主要由()、()、()和()构成。
【单选题】载体和外源DNA的连接反应中,DNA两端不同粘性末端的连接优于相同粘性末端的连接,因为: