对实验室恒温环境所采取的防护措施,包括()。
A.加强新风量
B.减少污染源
C.环境条件控制系统采用循环空气
D.加强人员防护
参考答案:A, B, D
棉花育种中,常将100粒籽棉的纤维质量(g)称为()。
A、子指
B、衣指
C、衣分
D、衣分率
You will probably see people from all over the world; you will certainly see people of every age, size, and shape, and you’ll get a free fashion show, too.