题目

下列有关减数分裂与受精作用的叙述，正确的是（ ）A.受精卵中的遗传物质一半来自父方，一半来自母方B.减数分裂与受精作用使亲子代的体细胞中染色体数目维持恒定C.人类的次级精母细胞中含有0或1条Y染色体D.雌雄配子彼此结合的机会相等，因为它们的数量相等 答案：B 6.A story goes ______ Elizabeth I of England liked nothing more than being surrounded by clever and qualified noblemen at court. A. when                B. that                          C. where        D. what