题目内容
Australians are advised to overcome the old taboo of ______.
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鉴定是否有质粒转入受体菌的方法是
由于最近的市场变化，绿岛公司必须在以后两年的时间里提高10%的生产率，否则它就会破产。事实上，从绿岛公司的生产和经营结构来看，如果能提高10%的生产率，那么它就能实现提高20%的生产率的目标。如果以上陈述为真，以下哪项陈述必然真（）
Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel (67) the coast. Even in the twentieth century, goods can be moved more cheaply by boat than by any other (68) of transport. These (69) make it possible for boats to travel (70) ports along the coast without being (71) to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their (72) a thousand miles shorter. Other canals permit boats to reach cities that are not (73) on the coast; still other canals (74) lands where there is too much water, help to (75) fields where there is not enough water, and (76) water power for factories and mills. The size of a canal. (77) on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to (78) each other easily. It must be deep enough to leave about two feet of water (79) the keel of the largest boat using the canal. When the planet Mars was first (80) through a telescope, people saw that the round disk of the planet was crises-crossed by a (81) of strange bluegreen lines. These were called "canals" (82) they looked the same as canals on earth (83) are viewed from an airplane. However, scientists are now (84) that the Martian phenomena are really not canals. The photographs (85) from space-ships have helped us to (86) the truth about the Martian "canals".
依次填入下列各句横线处的词语，恰当的一组是（）①初学者开始作文时是无所谓风格的，写作者达到比较成熟的境界，自己的特点充分______，风格就产生了。②看王小明那______的样子，又急又跳又吵，一点也沉不住气，完全不象“优胜班级”的班长。③那人东张西望，神色慌张，十分可疑，很可能就是那个行迹______而久未抓到的犯罪嫌疑人张某。
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