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【单选题】
将某种植物置于CO2浓度适宜、水分充足的环境中,温度分别保持在5 °C、15 °C、25 °C和35 °C条件下,改变光照强度,测定CO2的吸收速率,得到图1所示结果。处理图1中有关数据得到图2、图3。下列叙述不正确的是A.
图1中的自变量是温度和光照强度
B.
当光照强度大于7时，25 ℃与15 ℃条件下植物有机物的合成速率相同
C.
图2表示在5～35 ℃条件下该植物光饱和点的变化
D.
图3表示在5～35 ℃条件下该植物呼吸速率的变化
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【单选题】The midpoint of the temperature range over which denaturation of proteins occurs is called the ________ temperature, or T m .
A.
thawing
B.
melting
C.
cooling
D.
heating
【单选题】As shown in the figure, the temperature increases t1 above the beam and decreases t2 below the beam, and t1 < t2.The displacement of points C and D are:【图片】
A.
Both go up
B.
Both go down
C.
C goes up and D goes down
D.
C goes down and D goes up
【单选题】If a cup of coffee has temperature 95 celsius in a room where the temperature is 20 celsius, Conan found that the temperature of coffee after t minutes can be simulated by the following function What...
A.
58
B.
72
C.
76.4
D.
85
【单选题】Melting temperature (T m ): the temperature at which about____of the dsDNA is disassociated into the single-stranded DNA.
A.
30%
B.
50%
C.
70%
D.
100%
【简答题】In the summer, the wind current will be reversed because the temperature of the air over the land turns higher than ______.
【单选题】There is a kind of ideal gas in a container with unchangeable volume. When the temperature is at T0 the average speed of the gas molecule is【图片】, the average munber of collisions of molecules is【图片】 a...
A.
, ,
B.
=2 , =2 , =
C.
=2 , =2 , =4
D.
=4 , =2 , =
【简答题】案例:一个外国人要求在非公交站点下车,要求没有得到满足后,他骂了一句“ Chinese pig ”,还用塑料袋掷工作人员。全车的人都愤怒了,但工作人员“始终笑脸相迎”。这件小事见报后,引起了关于“爱国”的激烈争论。大多数人认为工作人员应该以牙还牙、当场还击,捍卫人格和国格尊严。少部分国民比较冷静,认为当场还击并不能维护人格和国格尊严,因为它们不是靠“骂”、“打”等不文明的方式来赢得或维护的,而是靠...
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