xét 1 tế bào sinh tinh mang 1 cặp nst, mỗi nst chứa 2 gen lần lượt là AB, ab khi giảm phân sẽ được những loại tinh trùng mang nst như nào

Trình bảy các giai đoạn phát triển của cơ quan hô hấp

At one time, for the (51. PONDER) ____________________ of people needing to make the journey, the only
way to travel from Europe to America was by ship, but the days of a (52. LEISURE) ____________________
five-day (53. ATLANTIC) ____________________ crossing in a large liner have long gone. Today, everything is
about speed, and long distance travel has become almost exclusively the business of the airlines.
Although air travel is admittedly fast, passengers are still subject to the unexpected (54. HOLD)
____________________ which seem to be inherent in any form of travel, but people’s reactions to such delays seem
to be far more (55. SEE) ____________________ than in the days of the great liners. Then, passengers might have
shrugged their shoulders (56. RESIGN) ____________________ and relaxed with a book in their cabins, knowing
that little could be done about the situation, but today’s traveller is more likely to make his (57. CONTENT)
____________________ known forcibly to any official who is unfortunate enough to appear on the horizon.
It is easy to see why this might be the case since airport lounges are (58. STANDARD)
____________________ clearly inadequately equipped to cope with large numbers of (59. SHIP)
____________________ passengers. Small wonder that people’s tempers begin to fray and their nerves are (60.
TAX) ____________________ when faced with the prospect of a sleepless overnight stay in what is, after all, no
more than a vast public hall.

cho đường tròn (O;13) và dây AB =24. trên các tia OA và OB lần lượt lấy các điểm M và N sao cho OM = ON = 33,8. chứng minh rằng MN là tiếp tuyến của đường tròn (O)

At one time, for the (51. PONDER) ____________________ of people needing to make the journey, the only
way to travel from Europe to America was by ship, but the days of a (52. LEISURE) ____________________
five-day (53. ATLANTIC) ____________________ crossing in a large liner have long gone. Today, everything is
about speed, and long distance travel has become almost exclusively the business of the airlines.
Although air travel is admittedly fast, passengers are still subject to the unexpected (54. HOLD)
____________________ which seem to be inherent in any form of travel, but people’s reactions to such delays seem
to be far more (55. SEE) ____________________ than in the days of the great liners. Then, passengers might have
shrugged their shoulders (56. RESIGN) ____________________ and relaxed with a book in their cabins, knowing
that little could be done about the situation, but today’s traveller is more likely to make his (57. CONTENT)
____________________ known forcibly to any official who is unfortunate enough to appear on the horizon.
It is easy to see why this might be the case since airport lounges are (58. STANDARD)
____________________ clearly inadequately equipped to cope with large numbers of (59. SHIP)
____________________ passengers. Small wonder that people’s tempers begin to fray and their nerves are (60.
TAX) ____________________ when faced with the prospect of a sleepless overnight stay in what is, after all, no
more than a vast public hall.

cho nửa đường tròn (o), đường kính AB, tiếp tuyến Ax. gọi C là một điểm trên nửa đường tròn. tia phân giác của góc CAB cắt nửa đường tròn ở E, AE cắt BC tại K. gọi I là giao điểm của AC và BE. chứng minh rằng

a) KI//Ax b) OE//AC

P = \(\dfrac{2\sqrt{x}-9}{x-5\sqrt{x}+6}-\dfrac{\sqrt{x}+3}{\sqrt{x}-2}-\dfrac{2\sqrt{x}+1}{3-\sqrt{x}}\)

Tìm x để p có giá trị nguyên