【单选题】如图,在△ ABC 中, D 是 AB 上一点, E 是 AC 上一点, BE , CD 相交于 F ,∠ A =70 °,∠ ACD =20 °,∠ ABE =28 °,则∠ CFE 的度数为 ( )
【单选题】某电池电动势与温度的关系为: E /V = 1.01845 - 4.05×10 -5 ( t / °C - 20) - 9.5×10 -7 ( t / °C - 20) 2 。 298 K 时,电池可逆放电,则( )。
【简答题】Andy loved the first grade. He loved his teacher,Mrs.Parks. He loved playing s on the playground. He loved learning about dinosaurs and the solar system (恐龙和太阳系). Every morning Andy’s mother dropp...
【单选题】The revival of the railroad service will be immensely ______ for the Speedy movement of passengers and cargo.
【单选题】某电池电动势与温度的关系为: E /V = 1.01845 - 4.05 × 10 -5 ( t / °C - 20) - 9.5 × 10 -7 ( t / °C - 20) 2 298 K 时,电池可逆放电 ,则:
【简答题】A.physically B.immensely C.thoroughly D.secretly
【简答题】A.physically B.immensely C.secretly D.thoroughly
【单选题】男性, 3 5,岁,硬膜外麻醉病人,手术中突然出现意识不清、血压降低、呼吸及促,并迅速出现昏迷、呼吸心跳停止。应考虑病人出现了
【单选题】______ there is a logical connection between all the things that happen in that immensely connected body of salted water that covers 71 percent of the suce of the earth.
D.
This dawns upon me that
【多选题】已知某电池电动势与温度的关系为E/V = 1.01845-4.05×10 -5 (T/K-293.15)-9.5×10 -7 (T/K-293.15) 2 ,则当电池可逆地产生2 mol电子的电荷量时,下列说法正确的是
A.
Δ r G m = -196.52 kJ/mol
B.
Δ r S m = -9.65 J/(K∙mol)
C.
Δ r H m = -199.40 kJ/mol
D.
该电池在 298.15K 的温度系数为 5.0 × 10 -5 V/K