Người đầu tiên chịu trách nhiệm về việc bảo vệ, chăm sóc, nuôi dạy trẻ em là?

A. Cha mẹ.

B. Người đỡ đầu.

C. Người giúp việc.

D. Cả A,B, C.

Một ô tô chở khách chạy trên đường, người phụ lái đi soát vé cùa hành khách trên xe. Nếu chọn người lái xe làm vật mốc thì trường hợp nào dưới đây đúng?

A. Người phụ lái đứng yên   

B. Ô tô đứng yên

C. Cột đèn bên đường đứng yên    

D. Mặt đường đứng yên

Cho hàm số y = (2m - 3)x + m - 1

b) Tìm m để đồ thị cắt đường thẳng y = 5x + 3 tại điểm có hoành độ - 1

Tìm x (theo mẫu)

Mẫu:

    x + 3 = 9

    x = 9 - 3

    x = 6

a) x + 8

b) x + 5 = 17

c) 2 + x = 12

d) 2 + x = 12

e) x + 4 = 15 

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 33 to 38.

Sylvia Earle, a marine botanist and one of the foremost deep-sea explorers, has spent over 6,000 hours, more than seven months, underwater. From her earliest years, Earle had an affinity for marine life, and she took her first plunge into the open sea as a teenager. In the years since then she has taken part in a number of landmark underwater projects, from exploratory expeditions around the world to her celebrated “Jim dive” in 1978, which was the deepest solo dive ever made without cable connecting the diver to a support vessel at the surface of the sea.

Clothed in a Jim suit, a futuristic suit of plastic and metal armor, which was secured to a manned submarine, Sylvia Earle plunged vertically into the Pacific Ocean, at times at the speed of 100 feet per minute. On reaching the ocean floor, she was released from the submarine and from that point her only connection to the sub was an 18-foot tether. For the next 2½ hours, Earle roamed the seabed taking notes, collecting 15 specimens, and planting a U.S. flag. Consumed by a desire to descend deeper still, in 1981 she became involved in the design and manufacture of 20 deep-sea submersibles, one of which took her to a depth of 3,000 feet. This did not end Sylvia Earle’s accomplishments.

It can be inferred from the passage that Sylvia Earle _______. 

A. is not interested in the scientific aspects of marine research 

B. is uncomfortable in tight spaces 

C. does not have technical expertise 

D. has devoted her life to ocean exploration