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【单选题】
有效洗手可清除手上()以上的暂居菌A.
75%
B.
80%
C.
50%
D.
99%
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】— What colour are the stars inside Australia's flag? — They're _____________. [ ]
A.
white
B.
beautiful
C.
right
【单选题】The main idea of the last paragraph is that people have ______.
A.
warmly welcomed the abundance of wealth shown by publishers
B.
warmly welcomed the enormous amount of creativity
C.
showed great enthusiasm in publishers of great wealth
D.
reacted strongly to the unlimited creativity of publishers
【单选题】—What colour are the trees in autumn (秋天)? —They're ______. [ ]
A.
yellow
B.
green
C.
white
【多选题】市场是具有特定需要或欲望,而且愿意并能够通过交换来满足这种需要或欲望的全部顾客,由 等要素构成。
A.
购买欲望
B.
购买场所
C.
购买力
D.
人口
E.
购买方式
【多选题】市场是具有特定需要或欲望,而且愿意并且能够通过交换来满足这种需要或欲望的全部顾客,有( )等要素构成。
A.
购买欲望
B.
购买场所
C.
购买力
D.
人口
E.
购买方式
【单选题】The word trivial in Paragraph 4 is closest in meaning to ______.
A.
slight
B.
important
C.
abundant
D.
significant
【单选题】The main idea of the last paragraph is that people have ______.
A.
warmly welcomed the abundance of wealth shown by publishers
B.
warmly welcomed the enormous amount of creativity shown by publishers
C.
showed great enthusiasm in publishers of treating wealth
D.
reacted strongly to the unlimited creativity of publishers
【简答题】按指定格式输入输出数据,使得a=3,b=4,c='w',d='e'。 #include “stdio.h” void main() { int a,b; char c,d; scanf("%d%d\n",&a,&b); ___________________ printf("a=%d,b=%d\n",a,b); printf("c=%c,d=%c\n",c,d); }
【简答题】简述重铬酸钾法测定COD的实验原理。实验中，使用的催化剂为何种物质?水样中的Cl - 如何消除?如测定水样的COD在85mg/L左右，则所使用的重铬酸钾标准溶液的浓度为多少?
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