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【简答题】
计算0．20mol．L—1NH3．H2O和0．20mol．L—1HCl等体积混合后溶液的pH是多少。
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反馈参考答案：
举一反三
【单选题】铺在台面上的无菌巾的层数及无菌单应下垂的长度应为
A.
4-6层、15cm
B.
2-4层、30cm
C.
4-6层、30cm
D.
4-6层、20cm
E.
2-4层、20cm
【单选题】回答{TSE}题： Traffic in Our Cities The volume of traffic in many cities in the world todaycontinues to expand. This causes many problems, including serious airpollution, lengthy delays, and the greater r...
A.
of
B.
for
C.
about
D.
by
【多选题】针对有关商人的内容,下列说法正确的事:
A.
商人最初是自然人,现在则既包含自然人,也包括法律拟制之人
B.
商人最初是“买卖商”或“商贩”,现在已发展到从事各种营业活动的商人
C.
商人最初与“士”“农”和“工”相对应,既是一种职业,也是一种社会阶层
D.
商人即以从事经营活动为职业的个人和组织
【单选题】The United Kingdom (英国) is a country of cities. When a country has many cities, we say it is urban. The United Kingdom is one of the most urban countries in the world. 80% of its people live in cities...
A.
a lot of people
B.
many foreign people
C.
a lot of cities
【简答题】Zoological parks in many cities export birds from many lands and are a source of recreation for millions of people each year.
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