Which of the following statements is true?
A.Depression would cause pressure.
B.Depression would cause blood pressure to go down.
C.Depression had definite connection with heart disease.
D.Mild depression is not at all harmful.
第6题
A.读数至0.01
B. 读数至0.0001
C. 读数范围1.3~1.7
D. 测定时温度应为20℃±0.5℃
E. 读数用校正用棱镜或水进行校正
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