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【单选题】
对于钢筋混凝土用砂，其氯离子含量不得大于（ ）。A.
0.06%
B.
0.05%
C.
0.5%
D.
0.6%
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举一反三
【单选题】The second paragraph tells us that the increased demand for electricity today .
A.
has led to the decrease in supplies of oil
B.
means that more countries are interested in nuclear power
C.
has increased the risk of accidental explosions
D.
has increased the very means of producing more atomic bombs
【简答题】热压作用产生的通风效应又称为( )。
【单选题】农药残留包括哪些物质？
A.
残存于环境、生物体和食品中的农药及其衍生物
B.
残存于环境、生物体和食品中的农药及其代谢物和降解物
C.
残存于环境、生物体和食品中的农药及其所含杂质
D.
以上全部都是
【简答题】有害物质的检查包括哪些内容 ( ) A.有机氯、有机磷农药残留量 B.重金属 C.黄曲霉毒素 D.砷盐A. 1 B. 1 C. 1 D. 1
【简答题】把一试探电荷 q=1.0×10 -10 C放入某电场中的A点,它具有的电势能为1.0×10 -9 J,则该点的电势为 ;若在 A点放入另一电荷qˊ=-1.0×10 -10 C,则该点的电势为 。
【单选题】Increased demand for a business item
A.
The economic condition of the enterprise improves, but the economic condition of the element that the enterprise uses deteriorates
B.
The economic condition of the enterprise deteriorates, but the economic condition of the factor used by the enterprise improves
C.
The economic situation of the enterprise and the factors used has improved
D.
The economic situation of the enterprise and the factors used has deteriorated.
【单选题】Increased demand for a country's _________ causes its currency to appreciate in the long run, while increased demand for _________ causes its currency to depreciate.
A.
imports; imports
B.
imports; exports
C.
exports; imports
D.
exports; exports
【判断题】Increased demand for employees typically is associated with increased demand for the products or services offered by an organization.
A.
正确
B.
错误
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