收集糖尿病患者的4种液体,分别用班氏试剂鉴定,最不可能生成砖红色沉淀的是[ ]
A.尿液
B.血清
C.组织液
D.汗液
答案:D
.______ the satellite launch drawing near, the research workers put their hearts to the test and always stayed up late.
A.As
B.Because
C.With
D.While
汽轮机的启动,按冲转时进汽方式可分为()和()。