在下图中，A到F的最短路径为：_______。[img=183x186]1803cf9f5538452.png[/img] A: AC、CF B: AD、DF C: AC、CD、DF D: AD、DC、CF
在下图中，A到F的最短路径为：_______。[img=183x186]1803cf9f5538452.png[/img] A: AC、CF B: AD、DF C: AC、CD、DF D: AD、DC、CF
普通二轮摩托车准驾车型代号为（） A: AD B: BM C: CE D: DF
普通二轮摩托车准驾车型代号为（） A: AD B: BM C: CE D: DF
在梯形ABCD中，AD∥BC，AB=DC=AD=6，∠ABC=60°，点E，F分别在线段AD，DC上（点E与点A，D不重合），且∠BEF=120°，设AE=x，DF=y．
在梯形ABCD中，AD∥BC，AB=DC=AD=6，∠ABC=60°，点E，F分别在线段AD，DC上（点E与点A，D不重合），且∠BEF=120°，设AE=x，DF=y．
全世界的煤还能使用大约（ ）年 A: 80 B: 130 C: 230 D: 330
全世界的煤还能使用大约（ ）年 A: 80 B: 130 C: 230 D: 330
全世界的煤还能使用大约（ ）年 A: ８０ B: １３０ C: ２３０ D: ３３０
全世界的煤还能使用大约（ ）年 A: ８０ B: １３０ C: ２３０ D: ３３０
In 1803 the United States purchased Louisiana from _____.
In 1803 the United States purchased Louisiana from _____.
如图在△ABC中，AD平分∠BAC，点D是BC的中点，DE⊥AB于点E，DF⊥AC于点F．
如图在△ABC中，AD平分∠BAC，点D是BC的中点，DE⊥AB于点E，DF⊥AC于点F．
该电路的差模电压放大倍数Ad=_____,输入电阻Rid=____kΩ,输出电阻RO=____kΩ A: 40 40 80 B: -40 80 40 C: -40 40 80 D: 40 80 40
该电路的差模电压放大倍数Ad=_____,输入电阻Rid=____kΩ,输出电阻RO=____kΩ A: 40 40 80 B: -40 80 40 C: -40 40 80 D: 40 80 40
In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.
In 1803, President Jefferson negotiated the purchase of Louisiana from Mexico.
For an AD disease, only 80% of individuals with heterozygote genotypes actually develop the disease symptoms. This indicates that A: penetrance of this disease is 80%. B: penetrance of this disease is 20%. C: expressivity of this disease is 80%. D: expressivity of this disease is 20%.
For an AD disease, only 80% of individuals with heterozygote genotypes actually develop the disease symptoms. This indicates that A: penetrance of this disease is 80%. B: penetrance of this disease is 20%. C: expressivity of this disease is 80%. D: expressivity of this disease is 20%.