Cho hình lập phương \(ABCD.A'B'C'D'\) , khi đó góc giữa $\left( ADD'A' \right)$ và $BCC'B'$ là:
A.${{90}^{0}}$
B.${{0}^{0}}$
C.${{180}^{0}}$
D.$\pi $

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Lack of rain early in the season means that the field ________ a poor crop.
A.surrendered
B.generated
C.yielded
D.suffered

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
In spite of the importance of biodiversity, _________ efforts are not strong enough.
 
A.conservation
B.conserve
C.conservative
D.conserved

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A.I algorithms can also help to detect faces and other features in photos sent to _______ sites and automatically organise them..
A.social networking
B.social media
C.social affairs
D.social contacts

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
According _______ Bill, there's something wrong _______ my computer.
A.upon / at
B.to / with
C.on / about
D.after / for

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
An automated _______ bomb robot can be used by the military of a country.
A.disposing
B.disposable
C.disposed
D.disposal

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.v
Strict ___ measures are in force in the capital to protect it from terrorism.
A.transportation
B.normal
C.scientific
D.security

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Although humans share a common ancestor with some primates, they did not _____ from apes, gorillas or chimps.
 
A.evolution
B.grow
C.growth
D.evolve

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I think the best way to __________ wild animals and plants is to protect their habitats.
 
A.keep
B.remain
C.conserve
D.protect

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The Global Positioning System (GPS) is a _______ navigation system that provides location information in all weather condition, anywhere on or near the Earth, and can be seen in advanced means of transport.
A.based space
B.space-based
C.basing space
D.space basing