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【单选题】
20ml 的移液管移出的溶液体积应记为 ( )A.
20ml
B.
20.0ml
C.
20.00ml
D.
20.000ml
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举一反三
【单选题】It is said that sixty percent of all energy ________ in the world today is being lost as wasted heat.
A.
produced
B.
producing
C.
to produce
D.
having produced
【单选题】Over time, my remaining hearing dropped to 20 percent, where it is today.
A.
Gradually I lost more of my hearing until I was 80 percent deaf, as I currently remain.
B.
Soon I lost 20 percent of my hearing after I moved to where I’m living today.
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