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【单选题】
萧伯纳曾说过:“在这个世界上,取得成功的人是那些努力寻找他们想要机会的人,如果找不到机会,他们就去创造机会,下面对这句话理解不正确的是A.
机遇一方面需要人敏锐地发现和捕捉，另一方面需要人通过努力去创造
B.
关注行业发展有助于挖掘机遇
C.
成功的职业生涯主要依靠等待机遇
D.
机遇永远是留给有准备的人
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【简答题】某公路上有一面大镜子，从镜子中看到汽车的车辆的号码如图 所示， 则该汽车的号码是（ ）。
【简答题】A．duck B．duty C．dust D．dump
【多选题】How is thymidylate derived from dCDP and dUMP?
A.
DNA contains thymine rather than uracil, and the de novo pathway to thymine involves only deoxyribonucleotides. The immediate precursor of thymidylate (dTMP) is dUMP. In bacteria, the pathway to dUMP begins with formation of dUTP, either by deamination of dCTP or by phosphorylation of dUDP. The dUTP is converted to dUMP by a dUTPase. The latter reaction must be efficient to keep dUTP pools low and prevent incorporation of uridylate into DN
B.
Conversion of dUMP to dTMP is catalyzed by thymidylate synthase. A one-carbon unit at the hydroxymethyl (–CH 2 OH) oxidation level is transferred from N 5 , N 10 -methylenetetrahydrofolate to dUMP, then reduced to a methyl group.
C.
The reduction occurs at the expense of oxidation of tetrahydrofolate to dihydrofolate, which is unusual in tetrahydrofolate-requiring reactions.
D.
The dihydrofolate is reduced to tetrahydrofolate by dihydrofolate reductase—a regeneration that is essential for the many processes that require tetrahydrofolate. In plants and at least one protist, thymidylate synthase and dihydrofolate reductase reside on a single, bifunctional protein.
【简答题】某国有工业企业, 2010 年度生产经营情况如下: ( 1 )销售收入 5 000 万元,销售成本 3 600 万元,主营业务税金及附加 140 万元。 ( 2 )其他业务收入 70 万元,其他业务支出 50 万元。 ( 3 )发生营业费用 300 万元、管理费用 500 万元、财务费用 200 万元。 ( 4 )发生营业外支出 160 万元。 ( 5 )投资收益 9 万元。 请计算该企业 201...
【简答题】演示技能是生物学教学中常用的教学技能,结合初中生物教材中绿色植物的蒸腾作用的相关内容,完成一个演示设计。
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