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【单选题】
I won’t go to see the film tonight, because I _________my ticket. [ ]A.
1ost
B.
have lost
C.
will lost
D.
didn't lost
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【简答题】板框过滤机主要用于培养基制备的过滤及霉菌、放线菌、酵母菌和细菌等多种发酵液的固液分离,比较适合固体含量()的悬浮液的分离
【单选题】关于干燥方法错误的是( )
A.
沸腾干燥可用来干燥液态物料
B.
喷雾干燥的缺点是能耗高，有黏壁现象
C.
冷冻干燥产品外观优良、易于溶解，可以长期保存，但设备成本过大
D.
微波干燥的特点是穿透力强，加热效率高，有杀虫灭菌效果
【多选题】关于板框过滤说法正确的有
A.
适合固体含量 1% ～ 10% 的固液分离
B.
主要应用于培养基制备过滤、霉菌、放线菌、酵母菌和细菌发酵液的固液分离
C.
过滤得到固相含水低
D.
过滤面积大
E.
不耐高压
【简答题】Car companies should help people better understand electric cars. fuel prices are high, more people will buy electric cars if they know that electric cars can save them money in the long term.
【单选题】In one year, you meet 52 people who are each unemployed for one week and eight people who are each unemployed for the whole year. What percentage of the unemployment spells you encountered was short t...
A.
52% was short term; 13.3% was long term
B.
52% was short term; 88.9% was long term
C.
86.7% was short term; 13.3 was long term
D.
86.7% was short term; 88.9 was long term
【多选题】以下说法错误的是
A.
极性液体电介质（如蒸馏水）在电气绝缘中应用较广
B.
选择电容器的绝缘材料时，通常选择介电常数小的材料
C.
选择电缆的绝缘材料时，通常选择介电常数大的材料
D.
变压器油中出现气泡时，将导致变压器油先击穿
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