风湿病中下列疾病测定HLA等位基因HLA-B27阳性率最高的是（）

A.类风湿关节炎

B.系统性红斑狼疮

C.强直性脊柱炎

D.干燥综合征

E.进行性系统性硬化病

Which of the following statements is true of the Parkinson’s disease
a. Parkinson’s always shows the same symptoms on different people.
b. People inflicted with Parkinson’s often have a shaking hand or a stiff hand.
c. The symptoms of Parkinson’s vary among different patients.
d. Victims of Parkinson’s find it difficult to recall what they have eaten for dinner.