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The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We __21___the first night we had arrived. We had all gone into the markets of the city ___22__the young people could experience its energy. But what we actually saw simply __23__ us all —- the rundown houses, the children in rags, the people begging for money … Walking home, ___24____ under a low bridge, we came across ___25___ families of homeless people seeking a bit of dry ground to sleep on __26__ the night. We had to step over bodies as we found our way through the darkness.

The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We __21___the first night we had arrived. We had all gone into the markets of the city ___22__the young people could experience its energy. But what we actually saw simply __23__ us all —- the rundown houses, the children in rags, the people begging for money … Walking home, ___24____ under a low bridge, we came across ___25___ families of homeless people seeking a bit of dry ground to sleep on __26__ the night. We had to step over bodies as we found our way through the darkness.
题目:The trip to that city was eye-opening for everyone, and near its end, all the young people in our group began to reflect on what it had meant. We __21___the first night we had a……继续阅读 »

艾弗里等人的肺炎双球菌转化实验和赫尔希与蔡斯的噬菌体侵染细菌试验都证明了DNA是遗传物质。这两个实验在设计思路上的共同点是

艾弗里等人的肺炎双球菌转化实验和赫尔希与蔡斯的噬菌体侵染细菌试验都证明了DNA是遗传物质。这两个实验在设计思路上的共同点是
题目:艾弗里等人的肺炎双球菌转化实验和赫尔希与蔡斯的噬菌体侵染细菌试验都证明了DNA是遗传物质。这两个实验在设计思路上的共同点是 A.重组DNA片段,研究其表型效应 B.诱发DNA突变,研究其表型效应 C.设法把DNA与蛋白质分开,研究各自的效应 D.应用同位素示踪技术,研究DNA在亲代与子代之间的传递 喵查答案:C 肺炎双球菌转化实验没有用到同位素示踪技术……继续阅读 »

可用于电动汽车的铝-空气燃料电池,通常以NaCl溶液或NaOH溶液为电解液,铝合金为负极,空气电极为正极。下列说法正确的是

可用于电动汽车的铝-空气燃料电池,通常以NaCl溶液或NaOH溶液为电解液,铝合金为负极,空气电极为正极。下列说法正确的是
题目:可用于电动汽车的铝-空气燃料电池,通常以NaCl溶液或NaOH溶液为电解液,铝合金为负极,空气电极为正极。下列说法正确的是 A.以NaCl溶液或NaOH溶液为电解液时,正极反应都为:O2+2H2O+4e-=4OH- B.以NaOH溶液为电解液时,负极反应为:Al+3OH--3e-=Al(OH)3↓ C.以NaOH溶液为电解液时,电池在工作过程中电解液的……继续阅读 »

有关“探究培养液中酵母菌数量动态变化”的实验,正确的叙述是

有关“探究培养液中酵母菌数量动态变化”的实验,正确的叙述是
题目:有关“探究培养液中酵母菌数量动态变化”的实验,正确的叙述是 A.改变培养液的pH值不影响K值(环境容纳量)大小 B.用样方法调查玻璃容器中酵母菌数量的变化 C.取适量培养液滴于普通载玻片后对酵母菌准确计数 D 营养条件并非影响酵母菌种群数量变化的唯一因素 喵查答案:D 养分、空间、温度和有毒排泄物等是影响种群数量持续增长的限制因素pH值变化影响微生物的……继续阅读 »

继希腊人之后,罗马人登上了地中海的历史舞台,经过希腊化的东征,建立起地跨欧、亚、非三洲的大帝国。然而,古罗马学者贺拉斯说,被征服的希腊人最终俘虏了罗马人。贺们斯所说的“俘虏”是指( )。

继希腊人之后,罗马人登上了地中海的历史舞台,经过希腊化的东征,建立起地跨欧、亚、非三洲的大帝国。然而,古罗马学者贺拉斯说,被征服的希腊人最终俘虏了罗马人。贺们斯所说的“俘虏”是指( )。
题目:继希腊人之后,罗马人登上了地中海的历史舞台,经过希腊化的东征,建立起地跨欧、亚、非三洲的大帝国。然而,古罗马学者贺拉斯说,被征服的希腊人最终俘虏了罗马人。贺们斯所说的“俘虏”是指( )。 A.商业征服 B.文化同化 C.宗教皈依 D.财富侵蚀 喵查答案:B ……继续阅读 »

根据原文内容,下列推断不正确的一项是

根据原文内容,下列推断不正确的一项是
题目:根据原文内容,下列推断不正确的一项是 A.孙诒让之所以未能释出“王”字,一个原因是刘鹗的《铁云藏龟》中所收“王”字字形单一,难以进行比较研究。 B.在罗振玉之前,由于未能释出甲骨文的“王”,所以人们无法证实卜辞是三千年钱殿王室的遗物。 C.从甲骨文、金文看,最早时候军事首领的权利只限于战场上,不但荷马时代的希腊如此,中国也是如此。 D.甲骨文、金文距离……继续阅读 »