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催化技术有酸碱催化、金属催化、酶催化和相转移催化,所涉及相转移催化剂按化学结构可以分为鎓盐类、 冠醚类 和非环多醚类等类别。
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举一反三
【简答题】下列叙述是有关蓄电池电压检查的。请选择 正确 的叙述。A. 当点火开关位于LOCK 位置时，如果检查到电压高于规定值，则蓄电池正常。 B. 当点火开关位于ON 位置时，如果检查到电压高于规定值，则蓄电池正常。 C. 当点火开关位于START 位置时，如果检查到电压高于规定值，则蓄电池正常。 D. 当发动机起动时，如果检查到电压高于规定值，则蓄电池正常。
【判断题】Manhattan, the Bronx, Queens, Staten Island and Brooklyn are the five boroughs that complete the greater city of New York City.
A.
正确
B.
错误
【判断题】New York is the commercial and financial center of the United States, and it is composed of five boroughs including Manhattan, Brooklyn, the Bronx, Staten Island and Queens.
A.
正确
B.
错误
【判断题】New York is composed of five boroughs, including Manhattan, Brooklyn. the Bronx, Staten Island and Queens.
A.
正确
B.
错误
【简答题】New York City consists of five parts: Manhattan, Brooklyn, Queens, the Bronx and Staten Island. The population is about 7.5 million and there are 1.5 million in Manhattan alone. Manhattan, the center ...
【简答题】Please write an introduction of Shenyang City or Shanghai City. You can take the following passage as reference. The City of New York is the most populous city in the United States. Located at the sou...
【判断题】Manhattan , the Bronx , Queens , Staten Island and Brooklyn are the five boroughs that complete the greater city of New York City.
A.
正确
B.
错误
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