题目

The woman is ____________ and she has a _____________ girl.A. thirty years old; nine years old B. thirty years old; nine-year-oldC. thirty-year-old; nine years old D. thirty-years-old; nine-years-old 答案：【答案】B【解析】句意：这个女人三十岁，她有一个九岁的女孩。考查主系表结构和复合形容词做定语。数字+years old：….岁，在句子中做表语；数字- year-old：…岁的，形容词，只可以做定语。结合句意可知填thirty years old; nine-year-old；选B。将图中果酒发酵装置改装后用于探究酵母菌呼吸方式的实验，下列相关操作错误的是（ ）A.改装时将盛有澄清石灰水的试剂瓶与管口2连通B.经管口3取样检测酒精和CO2的产生情况C.探究有氧条件下酵母菌呼吸方式时打开阀aD.实验开始前对改装后整个装置进行气密性检查