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【简答题】
下列关系中属于负相关的是：() A农田施肥量与亩产量之间的关系; B生产设备工作时间与维修费用之间的关系; C商品流通规模与流通费用之间的关系; D单位产品原材料消耗量与单位成本之间的关系
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【单选题】生物柴油是以植物油和动物油脂等为原材料制成的燃料。研究表明生物柴油燃烧后SO2和颗粒物质的排放量很少,特别是CO等有害气体的排放量比化石燃料低11%~53%。使用生物柴油的优点是( ) 1减少空气污染 2缓解温室效应 3不可再生 4减少酸雨危害
A.
①②③
B.
①②④
C.
①③④
D.
②③④
【单选题】Jack wanted to read more, so he asked his friend if there was ________ to read.
A.
something easy enough
B.
something enough easy
C.
enough easy something
D.
easy enough something
【单选题】生物柴油是以植物油和动物油脂等为原材料制成的燃料。研究表明生物柴油燃烧后SO 2 和颗粒物质排放很少，特别是CO等有毒气体的排放量比化石燃料低11%～53%。使用生物柴油的优点是（） ①减少空气污染 ②缓解温室效应 ③不可再生 ④减少酸雨危害
A.
①②③
B.
①②④
C.
①③④
D.
②③④
【单选题】Jack wanted to read more, so he asked his friends if there was ________ to read. [ ]
A.
something easy enough
B.
something enough easy
C.
enough easy something
D.
easy enough something
【单选题】Jack only wanted to ______.
A.
make something move
B.
lift something
C.
put something in place
D.
keep something in place
【单选题】生物柴油是以植物油和动物油脂等为原材料制成的燃料。研究表明生物柴油燃烧后SO 2 和颗粒物质排放很少，特别是CO等有害气体的排放量比化石燃料低11%～53%。使用生物柴油的优点是 ①减少空气污染 ②缓解温室效应 ③不可再生 ④减少酸雨危害 [ ]
A.
①②③
B.
①②④
C.
①③④
D.
②③④
【单选题】Why did Jack go to the umbrella shop?
A.
He wanted to buy a new umbrella.
B.
He asked the workers in the shop to mend the umbrellas.
C.
He wanted to return the umbrella to the woman.
【单选题】Jack told his daughter that she could have she wanted for Christmas.
A.
which
B.
whatever
C.
that
D.
whenever
【简答题】使用SQL语句查找“成绩”表中有“分数”的记录：SELECT﹡FROM成绩WHERE分数__________
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