下图中的元件最符合哪种封装名称()。
A.SOIC
B.TSOP
C.QFN
D.DFN
参考答案:A
卵泡刺激素的主要作用是()
A.促进卵泡生长发育和成熟
B.促进黄体形成
C.促进黄体分泌雌激素和孕激素
D.促进排卵
E.促进卵泡分泌孕激素和雌激素
___________ I toured Zhang Jiajie, I was deeply impressed with its beautiful scenery.
A.For the first time
B.At first
C.It was the first time
D.The first time