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【单选题】
在排水系统中，属于水平排水体的有A.
普通砂井
B.
袋装砂井
C.
塑料排水带
D.
砂垫层
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举一反三
【单选题】Dangerous bacteria can contaminate .
A.
organic food only
B.
non-organic food only
C.
organic and non-organic food
【单选题】Experts say that in the average home, the kitchen is the area with most dangerous bacteria.
A.
The kitchen is the cleanest room in the house.
B.
Kitchens often contain things that can make you sick.
C.
The kitchen is a dangerous place.
【单选题】设int a=9,b=8,c=7,x=1; 则执行语句 if(a>7)if(b>8)if(c>9)x=2;else x=3; 后,x的值是 。
A.
0
B.
2
C.
1
D.
3
【简答题】How is a blue hole different from a cave? a. A blue hole is always underwater. b. Caves usually have two sinkholes. c. Caves are inland, but blue holes are not. 2. What makes blue holes ...
【单选题】设int a = 9,b = 8,c = 7, x = 1;则执行语句后x的值是: if (a>7) if (b>8) if (c>9) x=2 ; else x = 3 ;
A.
0
B.
2
C.
1
D.
3
【简答题】实训题:
【单选题】Synthetic biology provides technical support for reviving and constructing from scratch dangerous bacteria or viruses such as Ebola, Smallpox and SARS viruses that can kill people in mass easily; this...
A.
biosecurity
B.
biosafety
C.
biorisk
D.
bioproduct
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