【单选题】关于冈崎片段的以下叙述,正确的是
A.
一个复制叉中的两条链,都要先合成冈崎片段然后再连接起来
B.
一条新链上,只有第一个冈崎片段需要引物引发,之后的冈崎片段不需要引物
D.
冈崎片段的产生是由于复制叉中两条链的方向相反,但新链只能沿一个方向进行延伸
【单选题】He gave us a nod and muttered a “yes” after _______ seemed like hours.
【单选题】He muttered a _______ under his breath.
【多选题】下列关于原核生物的冈崎片段的叙述,正确的是?
【单选题】When he learned that he had no choice but _____, Jack muttered under his breath, “I hate this stupid road.” prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【简答题】均匀磁场中,三角形、矩形和圆形三个平面线圈,面积相等且通有相同的电流,线圈的磁矩是否相等?所受的最大磁力矩是否相等?磁场力之和是否相等?
【单选题】When he learned that he had no choice but ________, Jack muttered under his breath, “I hate this stupid road.”