【单选题】According to the second paragraph,when did cell phones actually help to reduce pedestrian and traffic fatalities?
A.
Right after eell phones were invented.
B.
Before the number of eell phone users reached a critical mass.
C.
When cell phone users totaled to a certain number.
D.
When the number of cell phones decreased to a certain number.
【单选题】When did the Japanese surrender in the Second World War?
【判断题】骨迷路为颞骨岩部内的骨性隧道,可分为耳蜗、前庭和膜半规管三部分。( )
【简答题】人的耳朵可以分为三个部分,分别是外耳、中耳和()。
【简答题】听觉器官——耳可分为外耳、_________和内耳三部分。
【单选题】(THE THREE STRANGERS)Did the first stranger leave the cottage in a hurry when the second stranger arrives?
【简答题】内耳依解剖和功能可分为()、()和()三部分;组织学上分为()和()。
【简答题】耳可分为____、____和____三部分。
【单选题】When and where did the Second Continental Congress convene in America?