thirties这题我选B,可是答案是D,为什么?为什么这里形容年龄要把thirty 变thirties?：he wrote a ____ compositionA,two-thousand-words B'two-thousand-word C,two-thousands-wordD,two-thousands-words这题我选D的,可是答案是B,为

thirties这题我选B,可是答案是D,为什么?为什么这里形容年龄要把thirty 变thirties?：he wrote a ____ compositionA,two-thousand-words B'two-thousand-word C,two-thousands-wordD,two-thousands-words这题我选D的,可是答案是B,为 He was only in _______ at that time.A．his 30’s B．the 30’s C．his thirties D．the thirties选哪个,为什么可是答案是选c when he was thirties 这句话对吗?“他在三十岁时游遍世界各地”______,he travelled all over the world ,老师的答案是“In his thirties ”,我写了“when he was thirties ”,嗯...不好意思,看了看试卷前面那句是“ he began to learn English in his ----- a.thirtieth b.thirty c.thirty‘s d.thirties为什么不能是b 如图关于同类二次根式的.答案是b可是我觉得d没错啊 When he is ,he becomes interested in science.a.on his thirties b.in his thirty c in his thirties d.at his thirties 的意思! 1.The war broke out in___of_____century.A.the thirties...eighteenth B thirties...the eighteenthC.the thirties...the eighteenth D.thirties...eighteenth2.There was an interesting___in the newspaper todayA.context B.news C.item D.message3.She's a bit an 1.The war broke out in___of_____century.A.the thirties...eighteenth B thirties...the eighteenthC.the thirties...the eighteenth D.thirties...eighteenth2.There was an interesting___in the newspaper todayA.context B.news C.item D.message3.She's a bit an 衡量社会进步的标准是（）发展水平?B科学 C文化 D生产力我觉得应该是生产力,可是答案给出的是政治,这是为什么? 这题答案是C 可是我觉得应该选D so+动词+主语的意思是…也是so+主语+动词的意思是的确是这题答案是C 可是我觉得应该选D so+动词+主语的意思是…也是so+主语+动词的意思是的确是 求教 影响我国冬季气温分布的最重要因素是A.洋流B.地形C.纬度位置D.季风我选季风.可是答案选C. the shoe factory in tianjin has eight-------- workersa.hundred b.hundreds c.hundreds of d.hundred of答案选的是a,可是我觉得选c. Good to see you again.It's almost three years ___ we met last time.A.until B.before C.while D.since 我选了B,可是答案选D,可是我觉的since用于现在完成时,since加过去时间点,可是我还是觉得选B,意思是很高兴再一次见 已知有一直角三角形两条边分别为8米和6米,求另一条边的长度? A.6 B.8 C.10 D以上答案都不对这是我们的一道考试题,我选C,可是老师说选D,他说有两种可能,而C只有一种,没解全,可是我还是想不通 The first thing a student must have ____.a)been diligentb)is diligencec)to be diligentd)is diligent这题书上的答案是 d,可是我觉得应该是 b 为什麼是用形容词呢?还是书错了? 为什么我选的是D啊答案是B 这题函数的图像为什么选d呢我选了b 但是答案是d 表达式X=Sqr(a^2-5)+Sqr(b^2-5)的类型是（）A 算术表达式B 逻辑表达式C 关系表达式D 字符表达式我选了D,可是答案是C求详解.