Question 1, the meaning of this inverted triangle symbol is unclear, the three options of bcd3 are not equivalent, and it is suspected that the question is wrong. What should be asked is the only equivalent option, and the answer is A.

Question 2, D.

Question 3, D.

Question 4, Power Group Selection A

Question 5, choose C.

Question 6. If Rc represents an inverse relationship, choose D.

Question 7, choose C.

Question 8, choose C.

Question 9, choose C.

Question 10, choose a.