A teacher showed three toys to his students and asked them to find out the differences. All the three toys seemed to have the same shape, size and material. After looking at them carefully, t
Now that she is out of a job, Lucy _____ going back to school, but she hasn’t decided yet. A. had considered B. has been considering C. has been completed D. is goi
阅读下面这篇小说，完成文后（1）一(5)题。(24分) 扣 子 [前苏联]卡沙耶夫 瓦西利·维克托罗维奇·切尔内舍夫正在办公，同时用小电子计算器记
下列有关植物生殖方式的叙述中，不正确的是A．①是嫁接，是人工营养繁殖 B．②是组织培养，植物繁殖的速度很快C．③中种子萌发最先长出
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实验室部分仪器或装置如图所示，请回答下列问题． （1）写出仪器名称：A 、B ． （2）实验室常用石灰石和稀盐酸制取二氧
已知tan，则锐角α的度数是（ ） A．60° B.45° C.50° D.75°
“离土不离乡，进厂不进城”，就地转移农村剩余劳动力的模式对我国城镇化的进程客观上造成的不利影响是（ ） A.不能有效地发展工业 B.使农村
