问题
单项选择题
Questions 14-23
·Look at the ten statements for this part.
·You will hear a passage about "A Research on Sleep ". You will listen to it twice.
·Decide whetheryou think each statement is right(R), wrong(W) or not mentioned(NM).
·Mark your answers on the Answer Sheet.
Muscular relaxation, temperature drop and breath regularity are characteristics of Stage 4 sleep.
A. Right
B. Wrong
C. Not Mentioned
答案
参考答案：B