丝虫病的病变主要由于下列哪项引起()
A.活成虫
B.死成虫
C.活微丝蚴
D.死微丝蚴
E.毒素
参考答案:B
Susan, _____ university student from Europe, teaches me _____ art in her spare time.
A.an; /
B.a; the
C.an; the
D.a; /
远距离VonGraefe法检测,检测棱镜底向下5△视标对齐,诊为()。
A、RH5△
B、RH’5△
C、LH5△
D、LH’5△