【单选题】最适合用做链队列的不带表头节点的链表是 _______。
【单选题】药物与血浆蛋白结合成结合型药物后可能发生的变化是()
【简答题】何谓细胞融合?请举例说明细胞融合技术是细胞生物学研究的最基本技术之一。
【单选题】In what way did immigrants seeking economic freedom contribute to the strength of the U. S. economy?
A.
They introduced advanced political and economic institutions.
B.
They brought with them technical and managerial skills.
C.
They helped give America social mobility.