Mathematics, ____ just technology, has a life of its own independent of science. A. other than B. more than C. rather than D. less than
Shelly had prepared carefully for her biology examination so that she could be sure of passing it on her first_________. A. intention B. attempt C. p
读“南美洲轮廓图”，完成下列要求。 (1)下列四幅降水柱状图中，能正确反映③地和④地降水状况的分别可能是 图和 图。 (2)比较①地与②地
下列说法正确的是： （ ） ①正常雨水的pH为7.0，酸雨的pH小于7.0 ②严格执行机动车尾气排放标准有利于防止大气污染 ③
标准状况下，体积相同的下列四组物质，分子数相同的一组是 A．Cl2、P B．CO、CCl4 C．CO、H2O D．CH4、CO2
He _______ busy yesterday, or he ___ you with your experiment. A was, had helped B was , would have helped C. had been, would had helped D had been, wo
HNO2是一种弱酸，且不稳定，易分解生成NO和NO2；它能被常见的强氧化剂氧化；在酸性溶液中它也是一种氧化剂，如能把Fe2＋氧化成Fe3＋。AgNO2是一种难溶
如图表示精卵相遇示意图。仔细读图，回答下列问题。 （1）写出各部分名称： ①__________；②___________；③__________；④___________。 （2）精子与卵子相
