（4）有的环境激素可造成精子染色体缺失，这是精子DNA分子发生__________和DNA片段___________所致
根据现代生物进化理论．下列观点中正确的是
下列关于癌细胞的叙述，错误的是
下列离子方程式与所述事实相符且正确的是
After that, he knew he could any emergency by doing what be could to the best of his ability.
可与FeCI3试液直接呈色的药物是（ ）。
B I hated dinner partics. ButI decidedto give them anothar shot because I’m in LondonAnd my friend Mallery invited me. And because dinner parties in London are very differenfrom those back in New york. There, ‘Tin having a dinner party’ means: “I’m booklng a table for t2 at8 restaurant you can’t afford and we’ll be sharing the cheque evenly, no matter what you eat.” Worse, in Manhanan there is always someone who leaves before the bijanives. They’ll throw down cash, half of what they owe, and then people like me, who don’drink, end up paying even more. But ifI try to tree the same trick, the hostess will shou:”Where are you going” And it’s not likeI can say I have somewhere to go: everyone know shave nowhere to go
The silk thread found in the hair of an Egyptian mummy suggests that .
在大津巴布韦文明创造者问题上，我们需要反对西方某些人的什么观点揭示这种观点所反映的价值观。(3分)
50________
第二节 书面表达（满分25分）
对人类社会史前史的研究，始于19世纪中后期。下列著作中系统探讨人类社会史前史的是
What is talk mainly about
Z村拟建一座玻璃温室大棚和一家污水处理厂，应依次布局在
40_____