【单选题】设 ,则常数 a , b 的值所组成的数组( a , b )为( )
【单选题】患儿,女,1岁,母乳喂养,未添加辅食,近1个月来患儿出现面色苍黄,表情呆滞,反应迟钝,少哭不笑。入院后检查发现肝脾轻度肿大,血红蛋白70g/L,叶酸正常,维生素B12降低。该患儿的治疗措施正确的是
【单选题】The Mayan calendar far more accurate than the European calendars of the time most probably because ______.
A.
the Mayan numbers enabled the Mayan priests to study planets
B.
the European countries had no interest in founding a calendar
C.
the European calendars of the time probably were made by a guess work
D.
the year was divided into 18 months of 20 days each with five days left over
【简答题】判断一台交流电动机能否采用全压起动的条件是 ,其中 I ST 是指 , P N 是指 , I N 是指 , S T 是指 。
【单选题】. NET 语言不包括以下哪种语言( )
【单选题】患儿,女,1岁,母乳喂养,未加辅食,近1个月来患儿出现皮肤、面色苍黄,表情呆滞,反应迟钝,少哭不笑。入院后检查发现肝脾轻度肿大,血红蛋白为70g/L, 血清维生素B1290ng/L,血清叶酸3.5μg/L。针对该患儿的治疗措施,正确的是:
【单选题】下列脂肪酸1软脂酸、2亚油酸、3亚麻酸、4油酸、5花生四烯酸属于必需脂肪酸的是