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【简答题】
如图表示某植物光合作用速率与光照强度和CO 2 浓度的关系，请据图回答问题： (1)当光照强度≤P时，CO 2 浓度不同，光合作用速率___________(答“相同”或“不同”)。假如实际情况不是如此，你认为影响光合作用速率的因素还有________(答出一种即可)。 (2)M点时，该植物合成ATP的细胞结构有________，请写出发生在氧气充足条件下的该生理作用的化学反应式：________。N点时，该植物光合作用速率______(填“大于”、“小于”或“等于”)零。 (3)假如该植物是植物，则植物的N点、R点将怎样移动：N点____，R点________。 (4)图中能代表总光合作用速率的线段是___________(用字母表示)。 (5)若要通过人工照明来维持该植物的生长，最好使光照强度保持在图中的____点。 (6)若在该植物的叶片上一薄层凡士林油，光合作用的速率会大幅度下降，这一做法主要限制了光合作用的________反应阶段。
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【简答题】常见的螺纹紧固件包括 、 、 、 、 等。
【简答题】某混凝土工程所用配合比为C:S:G =1:1.98:3.90,W/C=0.60。已知混凝土拌合物的体积密度为2400kg/m 3 ,试计算1m 3 混凝土各材料的用量;若采用32.5级普通硅酸盐水泥,试估计该混凝土的28天强度(已知α a =0.53,α b =0.20,γc=1.13)。
【单选题】As a transcendentalist, Henry David Thoreau was not interested in travel. Which is not the reason for it?
A.
He felt that it was a distraction from the journey of oneself and one's mind.
B.
He felt that it was too complicated, thus betraying the virtue of simplicity.
C.
He felt that it required you to rely on too many people, thus betraying the virtue of self-reliance.
D.
He felt that traveling was too expensive.
【简答题】For Thoreau, as for Emerson,____and independence of mind ranked above all.
【简答题】For Thoreau, as for Emerson, ____________ and ____________ ranked above all.
【简答题】计算题：某混凝土工程，所用配合比为C://S：G＝1：1.98：3.90，W/C＝0.。已知混凝土拌合物的体积密度为2400kg/m3，试计算1m3混凝土各材料的用量；若采用42.5普通水泥，试估计该混凝土28天强度（已知αa＝0.46、αb＝0.07、Kc＝1.13）
【单选题】The American philosopher Thoreau once wrote, “ All the past is here.” As for culture, what does that mean?
A.
Culture is based on symbols.
B.
Culture is learned.
C.
Culture is transmitted from generation to generation.
D.
Culture is integrated
【单选题】Being a devoted abolitionist until the end of his life made Thoreau’s life stimulating and compelling. Which of the following statements is not true about Thoreau as an abolitionist?
A.
He wrote several essays, like "Slavery in Massachusetts" (1854) and “ A Plea for Captain John Brown “(1859), to support abolitionist cause.
B.
He helped slaves escape to the North through the Underground Railroad.
C.
He moved into the political forefront only with his defense of John Brown.
D.
He wrote many books about how helpful and necessary slavery is.
【简答题】某混凝土工程,所用配合比为 C : S : G =1:1.98:3.90, W / C =0.。已知混凝土拌合物的体积密度为2400kg/m 3 ,试计算1m 3 混凝土各材料的用量;若采用42.5普通水泥(富余系数为1.13),试估计该混凝土28天强度(已知f 28 = α a ·f ce ·(C/W- α b ),其中 α a =0.46、 α b =0.07,计算结果保留整数)。
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