【单选题】正确的无菌技术操作是
E.
打开无菌盘时,将无菌盘上层包布扇形折叠开口边向外
【单选题】与 RMgX 反应后,再酸性水解能得到伯醇的是
【判断题】出口玩具未能在检验有效期内出口或者在检验有效期内变更输入国家或者地区且检验要求不同的,应当重新向检验检疫机构报检。
【单选题】Canada is a country ________ many different nationalities as well as one with foreign immigrants __________ the majority of its population.
A.
making up of; occupied with
B.
consisting of; making up
C.
made up of; consisting of
D.
consisted of; taking up
【单选题】One of Canada’s greatest attractions, located at the Canada-United States border, is called _____________________.