动词填空 l. We hold this activity_______ (raise) money for the local people. 2. The government_______ (build) another two hospitals already so that people don't need to go to another city when they are ill. 3. How often_______ the Winter Olympics_______ (take) place? 4. It's a good chance for us_______ (learn) about European history. 5. Who_______ (attend) yesterday's charity show? It was really a success. 6. Just at that time I heard someone _______ (call) my name behind. It was my wife. 7. You should plan what you_______ (carry) for next week's spring trip在细胞分裂过程中出现了甲、乙2种变异,甲图中英文字母表示染色体片段。下列有关叙述正确的是
①甲图中发生了染色体结构变异,增加了生物变异的多样性
②乙图中出现的这种变异属于染色体变异
③甲、乙两图中的变化只会出现在有丝分裂中
④甲、乙两图中的变异类型都可以用显微镜观察检验
A.①③③ B.②③④ C.①②④ D.①③④